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Weekly Ketamine Infusions Show Initial, Repeated Depression Benefits

A new study shows that weekly ketamine infusions are associated with continued and maintained reductions in depressive symptoms among patients with treatment-resistant depression.

The findings, which are considered novel among studies assessing ketamine administration for patients with treatment-resistant depression, evidence the promising role the controversial drug could play in psychiatric care.

A team of investigators, led by Jennifer L. Phillips, PhD, an associate scientist in the Mood Disorders Research Unit at The Royal’s Institute of Mental Health Research, conducted a randomized, double-blind crossover comparison of single ketamine infusion versus active placebo control midazolam. The assessment, held with 41 participants with treatment-resistant depression at single treatment center, observed patients receive 6 open-label ketamine infusions 3 times per week over 2 once patients had a relapse of depressive symptoms.

Patients who reported a decrease of at least 50% in the Montgomery-Åsberg Depression Rating Scale (MADRS) received another 4 additional infusions once weekly in a maintenance phase.

Those administered a single ketamine infusion reported significantly reduced depressive symptoms at the primary efficacy endpoint of 24 hours post-care versus those treated with midazolam. The therapy showed cumulative antidepressant effects over repeated infusions, as well a doubling of antidepressant response rate in patients, according to linear mixed models.

Investigators found that 59% of patients met the response criteria following repeated infusions, with 3 infusions serving as the median dosage required to reach achieved response. In patients receiving weekly maintenance infusions, no further improvement in MADRS scores were reported.

The first-of-its-kind findings come just 1 month following the US Food and Drug Administration (FDA) approval of esketamine nasal spray (Spravato) for the treatment of patients with treatment-resistant depression. At the time, the therapy made history as the first novel treatment indicated for depression in 30 years—and headlines as one of the first hallucinogenic drugs to reach indication for a common condition.

Dennis Charney, MD, Dean of Icahn School of Medicine at Mount Sinai and a member of the Yale University team that led pioneering antidepressant ketamine trials in the 1990s, told MD Magazine® that microdosing or implementing controversial therapies for psychiatric care require what any other trial requires: control, safety, and a carefully-assessed standard for efficacy.



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‘Nothing less than transformational:’ Ketamine brings relief to people with severe depression

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Ketamine gave Rachel Morgan her life back.

The 33 year old has struggled to beat back severe depression and post-traumatic stress disorder for much of her life. She’s tried more than 30 psychiatric medications, none of which helped. Her inner pain reached a level so unbearable that she retreated from the world. She stayed in bed. She stopped doing the dishes and taking out the trash, which piled up in her San Francisco apartment. She stopped socializing.

She lost the will to live.

“I had gotten to a point where I disappeared, mentally and physically,” Morgan said. “My psychiatrist kind of put his hands up in the air and said, ‘There’s nothing else I can do for you.'”

But he did suggest something different she could try, albeit not through him: ketamine. The only legally available psychedelic in the U.S., the drug is widely used as an anesthetic in hospitals and medical settings. But it has been found to give people with severe mood disorders, including treatment-resistant depression and suicidal ideation, almost unbelievably fast-acting relief from their symptoms — some with a single dose, though more commonly it takes several treatments.

Morgan received her first ketamine infusion in a Palo Alto psychiatry clinic in June. By her second treatment, she took out the trash for the first time in months. After several infusions, friends told her she was talking more than she had in a year.

For the first time in her life, “I felt like there is a future for me,” Morgan said. “It’s left me a different person than I was a year ago.”

Ketamine is starting to shed its reputation as a psychedelic club drug and experimental mental health treatment as more patients like Morgan see results and more research is conducted on the drug’s impact on the brain. A watershed moment came in March when the U.S. Food and Drug Administration (FDA) approved Spravato, or esketamine, a ketamine nasal spray for adults with treatment-resistant major depression. One short-term clinical trial showed the spray had a statistically significant effect on depression compared to a placebo, and patients saw some effect within two days, according to the FDA.

A handful of local private psychiatry clinics, including in Palo Alto, Menlo Park and Woodside, have in recent years started offering ketamine. They are working at the forefront of a promising new treatment in psychiatry, a field that has seen little medication innovation for decades.

Many of the psychiatrists who run these clinics said they were initially skeptical of the drug’s potential, with little still known about how exactly ketamine works as an antidepressant and its long-term effects, but became believers when they saw life-changing improvements in patients for whom nothing else had worked.

“I think we’re on the brink of an amazing revolution in psychiatry,” said Alex Dimitriu, who offers ketamine treatments at his Menlo Park private psychiatry clinic. “We’re on the brink of understanding that a lot of drugs that previously we thought were drugs of abuse are actually turning out to be some very powerful agents.”

Exploring ketamine’s potential

Ketamine was developed in 1962 as a fast-acting anesthetic and continues to be widely used as such today, particularly for surgery and pain relief, including with children and in veterinary medicine. The drug is a schedule III controlled substance, meaning its medical use is accepted and it has moderate to low potential for abuse. The World Health Organization has included ketamine on its list of essential medicines since 1985 and calls it “possibly the most widely used anesthetic in the world.” As an anesthetic, it is incredibly safe (it does not depress breathing or blood pressure) and is easy to administer, according to the World Health Organization.

In higher doses, ketamine produces a “dissociative” state that can include hallucinations and out-of-body experiences. The drug’s conscious-altering potential led to its recreational use in the psychedelic era of the 1960s and 1970s.

Reports of ketamine use to treat psychological or psychiatric disorders first emerged in the 1970s, including in Argentina, Mexico and Russia, according to a study co-authored by Jennifer Dore, who offers ketamine at her private Helios Psychiatry practice in Woodside.

In 2000, a group of Yale University researchers published a seminal but small-scale study that found seven patients with major depression who received ketamine showed significant improvement in their symptoms within 72 hours, suggesting the drug could be used as an antidepressant.

Six years later, a National Institute of Mental Health study showed that ketamine reduced depression symptoms more quickly than a placebo.

Dore, who trained as a resident at the Stanford University Department of Psychiatry, became curious about ketamine several years ago while treating patients with severe PTSD and treatment-resistant depression. They simply weren’t getting better.

Dore dug into the available research on the drug’s antidepressant effects, which suggested that ketamine inhibits the action of the brain’s NMDA receptors and triggers glutamate production, which causes the brain to form new neural connections. She reached out to Phil Wolfson, director of the Center for Transformational Psychotherapy in San Anselmo, who pioneered ketamine-assisted psychotherapy, in which ketamine is administered while simultaneously patients receive therapy. She was compelled by taking this approach rather than the more medical model of providing the drug in isolation.

The results with her early patients in 2016 were like nothing she had ever seen.

“They had immediate relief,” she said.

Dore said her clinic was the first on the Peninsula to offer ketamine-assisted psychotherapy. She now offers trainings for other providers and sits on the board of the Ketamine Research Foundation.

In March, Dore published a five-year study with two other psychiatry practices that found patients who received ketamine saw clinically significant improvements in depression and anxiety, particularly so for people who came in with more severe symptoms like suicidality and a history of psychiatric hospitalization. At their clinics, they saw the drug help people suffering from obsessive compulsive disorder, bipolar disorder, personality disorders, substance abuse, psychological reactions to physical illness and even relationship issues and social anxiety.

“Ketamine promotes a time-out from (the) ordinary, usual mind, relief from negativity, and an openness to the expansiveness of mind with access to self in the larger sense,” Dore’s study states. “These effects enhance a patient’s ability to engage in meaningful psychotherapy during and after administration.”

Dore is a staunch champion of combining ketamine with psychotherapy, which she believes is necessary to harness the full potential of the drug. She doesn’t see ketamine as a magic bullet, but rather one tool she can use in concert with others — talk therapy, medication, nutrition — to treat people in serious psychological pain.

Before patients start ketamine, Dore carefully evaluates them to determine if it’s an appropriate next step in their treatment, as recommended by the American Psychiatric Association, including through therapy sessions, psychological tests and a review of their medical history. If they choose to proceed, Dore requires patients to sign a lengthy consent form that explains how ketamine works and its potential benefits and risks.

During a patient’s initial treatment, Dore monitors their physical and emotional responses, including blood pressure and heart rate, to decide on an appropriate dose going forward. The highest doses can produce the dissociative state, or the dream-like sensation of disconnecting from reality, Dore said. (Some people believe they have died and are in a new reality, she said. One patient described it as being in a lucid dream.) At lower doses, it can feel more like having a glass of wine, she said. The peak effects last about 15 to 30 minutes, according to Dore.

Patients can take the ketamine via a small lozenge that dissolves under their tongues, intravenously or an intra-muscular injection.

They receive the ketamine in a large second-floor space at Dore’s practice. It resembles a homey living room more than a psychiatric setting — a reflection of the importance of creating “set and setting” for a psychedelic experience, including a comforting physical environment. A large, soft corner couch is strewn with pillows, including one that says “anger” and another, “love.” During treatments, Dore pulls down the blinds on the windows, adjusts the temperature and offers patients weighted blankets, eyeshades and quiet music. The sessions last two to three hours.

Gaining a new perspective

Andy Mathis was at the end of his mental rope when he found Dore. A father, husband and successful tech industry executive, he had quietly suffered from self-doubt and insomnia since he was a young child. By the time he reached his mid-40s, it had escalated to depression. He felt his well-being and very brain chemistry was at risk.

A friend of a friend referred him to Dore, who prescribed him antidepressant and anti-anxiety medications that finally helped him sleep. But she suspected there was more to understand about the root causes of his symptoms, he said, and suggested ketamine as a means for exploring that.

A former professional tennis player, Mathis said he had never taken any drugs before. He did his own research on ketamine and thought it sounded “groundbreaking.” He was more curious than fearful about embarking on a psychedelic experience.

He received his first infusion two and a half years ago and continues to get ketamine every four to eight weeks today.

“It was indeed transformational,” Mathis said. “Nothing less than transformational.”

Mathis described the experience as taking him out of his own ego, a “tilt(ing) of the prism on how I see things.”

“It allowed me to have a detached, philosophical view on all things — me, my place in the world, my relationships,” he said.

This helps him make sense of his emotions “in a way that can be extremely difficult and sometimes even impossible to do when I am inside of myself,” referring to his default, day-to-day mental state.

Over the course of the infusions, Mathis started feeling more comfortable in his own skin, which he said improved his relationships and even his work performance. He realized he has a love for music and at age 47, started to learn how to play the saxophone. He came to a better understanding of his relationship to food and how he had used it as a coping mechanism.

Combining the ketamine-induced realizations with therapy was crucial, Mathis said.

“It was the post-experience discussions that we would have that would also unravel and unwind some of the unhealthy habits,” he said. “I’m 47 now, almost 48. I am healthier now than I was probably, maybe, ever.”

Dore likened ketamine’s power as a catalyst for psychological change to “a year of psychotherapy in three hours.”

Unlike antidepressants, patients don’t have to take ketamine every day and do not experience significant side effects; they can become nauseous or slur their words during the treatment, psychiatrists said. They require patients to have someone to drive them home after the treatment.

Mathis, for his part, did not experience any negative side effects. A patient at another local psychiatry clinic, Lisa Ward, however, said her mind feels “foggy” if she has two infusions in a single week. According to the FDA, the most common side effects experienced by patients treated with Spravato, the esketamine nasal spray, in clinical trials including disassociation, dizziness, nausea, lethargy and increased blood pressure.

“It would be inhumane,” Dore said, to not offer ketamine to people in intractable mental anguish. “We need things that are transformative, that aren’t putting a Band-Aid on a problem.”

Psychiatrist calls it ‘life-changing’

When Rameen Ghorieshi first looked into ketamine as an option for a patient with treatment-resistant depression about five years ago, it was still “very much fringe,” he said. His colleagues at Stanford, where he completed his psychiatric training, knew about the drug but had no idea how to actually use it as a treatment.

He decided to offer ketamine at his small private practice in downtown Palo Alto, Palo Alto Mind Body. He trained with an anesthesiologist and started with two patients. One suicidal young woman who had dealt with a chronic illness since childhood and didn’t intend to live past 30 years old, he said, got to the point where she was working four days a week, socializing and planning to go back to school.

“That just blew my mind,” Ghorieshi said. “I knew it would help just reading the studies but seeing it firsthand was pretty incredible.”

He has done more than 1,000 ketamine infusions at his downtown Palo Alto practice. Eighty-seven percent of patients rated their improvements as significant and 35% of those described it as “life-changing.” It particularly helped suicidal patients, he said. About 13% of patients said the improvement in their symptoms was not worth the time and effort of the infusions.

“This is a bit of a departure for me. I’m a very conservative prescriber,” Ghorieshi said. “My patients tend to be on one, two, maybe three medications. … But it was so remarkable that it seemed hard not to offer it to people.”

Ghorieshi said his was the first clinic in the Bay Area to treat someone with the tightly controlled, FDA-approved nasal spray. A handful of his patients have since received it, with good results, he said.

Esketamine is attached to a federal Risk Evaluation and Mitigation Strategy, which the FDA “can require for certain medications with serious safety concerns to help ensure the benefits of the medication outweigh its risks.” Providers and patients must register and the drug must be administered in a certified medical office under the supervision of a health care professional.

At Palo Alto Mind Body, patients receive eight ketamine infusions over several weeks. They are strongly encouraged to also pursue therapy but it’s not part of the treatment itself, Ghorieshi said.

He or a nurse supervises patients over the course of the 90-minute appointments. Morgan likes to sit upright on the couch in Ghorieshi’s office, covered by a blanket that keeps her warm and gives her a sense of emotional security. She listens to relaxing elevator music. After, she goes home and naps off the residual effects.

Years ago, she was given much higher doses of ketamine as a pain treatment for chronic physical illnesses and had horrible hallucinations, which she described as “having my head slammed against a wall repeatedly by a slime monster from a deep black bog.”

At the dose Ghorieshi gives her, she feels like the floor and ceiling switch. Her inhibitions dissolve. Afterwards, she feels more open to trying new experiences, from coping mechanisms for her depression to new foods. She feels her perfectionism, which for a long time had prevented her from being vulnerable with others, soften.

“To me, that’s the magic of ketamine,” Menlo Park psychiatrist Dimitriu said of the drug’s tendency to destabilize entrenched behaviors. “I think that speaks to the magic of future psychedelic research, which is down the pipeline, in that it increases our openness to new experience. The general belief here is if you’re depressed severely, you get stuck in maladaptive patterns.”

Lisa Ward didn’t see immediate relief from her life-long depression after her first ketamine infusion with Ghorieshi in March.

Then, a week later as the drug continued to work in her system, “the whole cloud just lifted,” she said. (It takes most patients several treatments to see results, according to Ghorieshi.)

She had more energy. She felt more productive. The benefits extended to her loved ones, as she’s engaged more with her two young children, husband, her parents and her sister.

“It’s enough for me to have more fun with my kids. It’s enough for me to spend more time with my husband instead of going to bed because I just can’t deal with the day anymore,” she said. “Being in depression you don’t realize it but it takes a big toll on other people.”

For Ward, a photographer, the effects of ketamine last about five weeks before she feels the cloud returning. There was one period where the ketamine seemed to stop working all together. Because she lives in Hollister — a three-hour round trip drive from Palo Alto, not including the time of the session itself — and pays out of pocket for the expensive treatment, gaps between her appointments stretch longer than she’d like.

She actually doesn’t enjoy the experience of being on ketamine, which she described as mind-bending and often intense. But she said the disruption of her depression allows her to focus on shifting the underpinning behavior and thought patterns.

Ketamine “doesn’t magically lift all … your problems away,” Ward said. “You’re more apt to make changes when you’re thinking clearly and you’re not so focused on the depression.”

While esketamine, the nasal spray, is covered by insurance because of the FDA approval, most other ketamine administrations are not. Morgan pays almost $1,000 out of pocket for each infusion, though Ghorieshi said some of his patients have been reimbursed for their treatments. Dore charges patients for her time as a provider, about $1,000 for a several-hour session, rather than for the drug itself.

Morgan felt strongly about using her full name in this article to dispel stigma around ketamine in the hopes it will be more widely accepted — and thus available to more people in need.

“Just because you hear something in one context, like ketamine being used as an illicit drug, doesn’t mean it doesn’t exist in another,” she said. “I think that’s what scares insurance companies away from covering it for patients. And that’s what makes me angry because I wish this treatment was out there for everybody to see. I’m lucky enough to be able to handle the financial portion, but the average person might not be.”

The as-yet-unknown risks

Despite the success stories, ketamine has not yet been fully accepted by the broader psychiatric community. The unanswered questions and possible risks that surround ketamine — how it works as an antidepressant, the long-term effects, the potential for abuse — are cause for caution, said Alan Schatzberg, a Stanford School of Medicine psychiatry professor and former president of the American Psychiatric Association.

“Rarely has there been so much anticipation for a new antidepressant as has been seen for intranasal esketamine,” he wrote in the American Journal of Psychiatry in May about the newly FDA-approved ketamine nasal spray.

“Do we have clear evidence of efficacy? Maybe. How strong is the efficacy? Apparently mild. Do we have a real sense of how long and how often to prescribe it? It’s not entirely clear.

“Taken together,” he wrote, “there are more questions than answers with intranasal esketamine, and care should be exercised in its application in clinical practice.”

In an interview, Schatzberg said he’s concerned about repetitive, extended use of any form of ketamine and the drug’s potential for dependence. The American Psychiatric Association has said that the literature on ketamine’s longer-term effectiveness and safety is so limited that the organization cannot “make a meaningful statement” on such use.

“The scarcity of this information is one of the major drawbacks to be considered before initiating ketamine therapy for patients with mood disorders and should be discussed with the patient before beginning treatment,” an American Psychiatric Association task force wrote in a consensus statement on ketamine in 2017.

Schatzberg co-authored a 2018 study that suggests ketamine’s antidepressant effects are tied to the brain’s opioid system and said the implications of this for dependency should be studied further.

“This is the same as any potential drug of abuse, any kind of opioid type drug. Serial use is less the issue. It’s when you get into repetitive use that one needs to be careful,” Schatzberg said. “That’s the clarion call that we’ve been sounding.”

One of his study co-authors, Carolyn Rodriguez, a Stanford associate professor of psychiatry and behavioral sciences, has been blown away by the rapid benefits of ketamine in studies she’s conducted with patients with obsessive compulsive order, or OCD. In the first-ever randomized clinical trial of ketamine compared to placebo in OCD, she found that a single low dose of ketamine prompted a decrease in OCD symptoms within hours for all participants.

Yet she remains cautious and said more research is needed to fully understand the powerful drug. She’s currently studying the mechanisms of how ketamine works so quickly on OCD patients, with funding from the National Institute of Mental Health.

“I believe that the state of the field of ketamine and how it works on OCD is not at the point yet where I would recommend it clinically because I always like to see science, (including) my own science, replicated,” Rodriguez said.

With pause about the long-term effects, she and other researchers have suggested a national registry be created to monitor side effects.

Ghorieshi said he is frank with his patients about the unknowns and potential downsides of ketamine, which must be weighed against other risks.

“We do know the immediate mortality and morbidity of things like suicide and depression.

I think that’s, as with anything, the risk-benefit. What are the risks of suicide, but also depression and anxiety in general?” he said. “You have to balance that versus these unknown risks of ketamine.”

Mathis, for his part, said he’s not concerned about the long-term effects of taking ketamine.

“What I worry about,” Mathis said, “is what my health would have done without it.”

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Mindfulness-Based Prevention Outcomes for Cocaine Dependence Improved by Ketamine Injection

A single ketamine infusion improved several treatment outcomes in adults with cocaine dependence who were engaged in mindfulness-based behavior modification, according to study data published in the American Journal of Psychiatry.

Individuals seeking treatment for cocaine dependence (n=55) were randomly assigned to receive a 40-minute intravenous infusion of either ketamine (0.5 mg/kg) or midazolam (0.025 mg/kg) as part of a five-week trial. Patients were hospitalized for five days in a psychiatric research unit, during which time they received daily sessions of mindfulness-based relapse prevention. On day 2, patients received their infusion; on day 5, they were discharged. Patients then attended twice-weekly follow-up visits for four weeks, at which they continued their sessions and were assessed for various clinical variables. Cocaine use after discharge was assessed via patient interview and urine toxicology screening. A six-month follow-up interview was also conducted by telephone.

Demographic and clinical variables were similar in patients who received ketamine (n=27) and patients who received midazolam (n=28). Route of cocaine ingestion was controlled for in all analyses. A total of 48.2% of patients in the ketamine group remained abstinent during the last two weeks of the trial compared with 10.7% of the midazolam group. The odds of end-of-study abstinence in the ketamine group was nearly six times that in the midazolam group (odds ratio, 5.7; 95% CI, 1.3-25.1; =.02). Per Cox regression analysis, the ketamine group was 53% less likely to relapse compared with the midazolam group (hazard ratio, 0.47; 95% CI, 0.24-0.92; =.03). In addition, craving scores were 58.1% lower in the ketamine group than in the midazolam group (=.01). At the six-month telephone follow-up interview, 12 patients (44%) in the ketamine group reported abstinence compared with none in the midazolam group. The percentage of abstinent individuals was significantly associated with treatment group (<.001). 

A single ketamine infusion was associated with significantly improved treatment outcomes compared with midazolam in a cohort of adults with cocaine dependence. Further research in a larger sample is needed to confirm these findings.

Reference

Dakwar E, Nunes EV, Hart CL, et al. A single ketamine infusion combined with mindfulness-based behavioral modification to treat cocaine dependence: a randomized clinical trial [published online June 24, 2019]. Am J Psychiatry. doi:10.1176/appi.ajp.2019.18101123

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Ketamine could be first of new generation of rapid acting antidepressants, say experts

Ketamine is the first truly new pharmacological approach to treating depression in the past 50 years and could herald a new generation of rapid acting antidepressants, researchers have predicted.

“We haven’t had anything really new for about 50 or 60 years,” said Allan Young, professor of mood disorders at the Institute of Psychiatry, Psychology and Neuroscience at King’s College, London, at a briefing on 12 July at London’s Science Media Centre.

Most of the new launches have been “tinkering with drugs which were really discovered in the ’50s and ’60s,” he explained. “Even the famous Prozac, which came in in the late ’80s, is really just a refinement of the tricyclic antidepressants that came in the ’50s. People say we are still in the age of steam, and we need to go to the next technological advance.”

Slow onset

In the past few years the focus has fallen on ketamine, which is used for pain relief and anaesthesia but is better known for being a horse sedative and a “club drug” that can induce hallucinations and calmness. It has been found to have rapid antidepressant effects and to be effective in many patients with treatment resistant depression.

US clinics increasingly offer IV infusions of ketamine off label, and in March esketamine, a nasal ketamine based drug, was approved by the US Food and Drug Administration for treatment resistant depression,1 at a cost of £32 400 (€36 060; $40 615) per patient per year.

Carlos Zarate, chief of the Experimental Therapeutics and Pathophysiology Branch at the US National Institute of Mental Health, who has been a key figure in the discovery and evaluation of ketamine as an antidepressant, said that one of the main problems with current antidepressants was their speed of onset in terms of antidepressant and anti-suicidal effects.

He explained that it took 10-14 weeks to see significant improvement with monoaminergic based antidepressants. “In my mind that is too slow,” he said. “We are focusing on treatments that can produce results within hours. That is where we are heading with the next generation of antidepressant, and ketamine is now the prototype for future generation antidepressants which will have rapid, robust antidepressant effects—rapid within a few hours.”

Efficacy and tolerability

Zarate said that, besides correcting chemical imbalances of serotonin and norepinephrine, the new generation of ketamine based antidepressants had other effects such as enhancing plasticity and restoring the synapses and dendrite circuits that shrivel in depression.

When ketamine is given to patients it binds to the N-methyl-D-aspartate (NMDA) receptor, causing a series of transient side effects including decreased awareness of the environment, vivid dreams, and problems in communicating. But the half life of ketamine is only two to three hours, so these side effects quickly subside, whereas the therapeutic effects of the drug last seven days or longer.

Zarate’s team is now focusing on the 24 metabolites of ketamine to hone the drug’s efficacy and tolerability. One of these, hydroxynorketamine, has already been shown to have similar antidepressive effects to ketamine in animals, without the side effects, and it is due to be tested in patients this autumn.

“Ketamine may actually be a prodrug for hydroxynorketamine,” said Zarate.

High cost

A few dozen patients with treatment resistant depression have been treated with ketamine in UK trials, and the European Medicines Agency and the Medicines and Healthcare Products Regulatory Agency are due to reach a decision on authorising esketamine for marketing in October. If the drug is approved private clinics will be able to provide it. But it would be unlikely to be available through the NHS until at least 2020, if at all, as the National Institute for Health and Care Excellence would need to deem it cost effective.

Rupert McShane, consultant psychiatrist and associate professor at the University of Oxford, said that, as well as the likely high cost of esketamine, patients treated with it must be observed in a clinic for two hours after each administration. This would require substantial clinical time, as esketamine is given twice a week for the first month, once a week for the second month, and once a week or once a fortnight from then on.

McShane also recommended that, if approved, a multidrug registry should be set up to monitor the long term safety and effectiveness of ketamine based drugs. Patients would be asked to input their use of any prescribed ketamine, esketamine, or any other future ketamine based product, as well as any self medication with illicit ketamine.

References


    1. Silberner J
    . Ketamine should be available for treatment resistant depression, says FDA panel. BMJ2019;364:l858.doi:10.1136/bmj.l858 pmid:30796014FREE Full TextGoogle Scholar

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Ketamine Study Reveals How to Make It an Even Better Depression Treatment

In early March, the FDA approved a nasal spray for depression based on ketamine, a substance once known only as a rave drug. Despite its reputation, ketamine is so promising as an anti-depressant that it will soon be available in licensed clinics throughout the country. A study published in Science on Thursday proposes the new treatment can be made even better.

In their paper, a team of scientists at Weill Cornell’s Medicine’s Feil Family Brain and Mind Research Institute show that ketamine can help the brain reform synapses, crucial connections between neurons, that can alleviate depressive symptoms. Ketamine is already famous for working quickly to relieve depressive symptoms — within days or hours — co-author Conor Liston, Ph.D., tells Inverse, but maintaining those crucial connections is key to extending its effects.

“Our study shows that the formation of new connections (synapses) between brain cells is required for sustaining ketamine’s antidepressant effects in the days after treatment,” says Liston, also professor of neuroscience at Weill Cornell. “Ketamine is an exciting new treatment for depression that differs from drugs like SSRIs in that it relieves symptoms rapidly. However, those effects are not always sustained.”

upset, depressed
Ketamine-based nasal spray is a new FDA-licensed drug for treatment-resistant depression.

Growing Back Dendritic Spines

In a mouse model, Liston and his co-authors demonstrated that doses of ketamine helped mouse brains regrow dendritic spines, small protrusions on neurons that help them pick up signals rom other cells that, crucially, degrade during exposure to chronic stress. These dendritic spines are a key part of synapse formation.

The degradation of these spines is not a perfect analog to human depression, but humans have them as well, and Liston points out that some of the most important features of depression in humans are also present in chronically stressed mice.

To create depression-like conditions, the team degraded the dendritic spines in their mice using stress hormones. Then, they gave one group a dose of ketamine, which they expected to have anti-depressive effects.

dendritic spine
A dendritic spine helps form a synapse — a connection to another neuron.

The dose of ketamine not only changed the mice’s behavior — they tried harder to escape their cages — it also helped reform the dendritic spines in their brains. Interestingly, the ketamine didn’t form random dendritic spines but actually seemed to replace the old ones that had been degraded by constant stress. Of the new spines formed, 47.7 percent grew within two micrometers of where the old ones once were.

Why Dendritic Spines Are Important

The new dendritic spines serve an important purpose in the mouse brains. Within three hours of treatment, previously damaged circuits in the prefrontal cortex were starting to come back online, but this happened before new synapses form. At the end of the experiment, an estimated 20.4 to 31.0 percent of the lost synapses were restored after the mice took ketamine.

The fact that the circuits were restored before the synapses reformed suggests that ketamine jump-starts a two-step process that fights depression. The first step is the rapid anti-depressant effect that is seen in so many studies. The second step — regrowing the spines and restoring synapses — occurs more slowly, which means it’s the one scientists should focus on if they’re looking to make ketamine’s effects on depression last longer, Liston says.

When Liston used blue light to artificially remove the newly grown spines in a follow-up experiment, the mice relapsed into depressive symptoms. It suggested that maintaining these dendritic spines is important in keeping depression at bay.

“Our results suggest that interventions aimed at enhancing the survival of newly formed connections in prefrontal brain circuits could be useful for augmenting ketamine’s antidepressant effects by increasing their durability in the days and weeks after treatments.”

The FDA’s approval of a ketamine-based drug to treat depression was groundbreaking in itself, especially since it works differently than other anti-depressant drugs. But just because it’s been approved doesn’t mean there aren’t ways to improve it. Depression can be alleviated with ketamine, but for now the illness constantly threatens individuals with remission. Preventing the potential for a relapse with the promise of longer-lasting effects is one way to make this already remarkable drug even more helpful.

tructured Abstract

INTRODUCTION

Depression is an episodic form of mental illness, yet the circuit-level mechanisms driving the induction, remission, and recurrence of depressive episodes over time are not well understood. Ketamine relieves depressive symptoms rapidly, providing an opportunity to study the neurobiological substrates of transitions from depression to remission and to test whether mechanisms that induce antidepressant effects acutely are distinct from those that sustain them.

RATIONALE

Contrasting changes in dendritic spine density in prefrontal cortical pyramidal cells have been associated with the emergence of depression-related behaviors in chronic stress models and with ketamine’s antidepressant effects. But whether and how dendritic spine remodeling is causally involved, or whether it is merely correlated with these effects, is unclear. To answer these questions, we used two-photon imaging to study how chronic stress and ketamine affect dendritic spine remodeling and neuronal activity dynamics in the living prefrontal cortex (PFC), as well as a recently developed optogenetic tool to manipulate the survival of newly formed spines after ketamine treatment.

RESULTS

The induction of depression-related behavior in multiple chronic stress models was associated with targeted, branch-specific elimination of postsynaptic dendritic spines and a loss of correlated multicellular ensemble activity in PFC projection neurons. Antidepressant-dose ketamine reversed these effects by selectively rescuing eliminated spines and restoring coordinated activity in multicellular ensembles that predicted motivated escape behavior. Unexpectedly, ketamine’s effects on behavior and ensemble activity preceded its effects on spine formation, indicating that spine formation was not required for inducing these effects acutely. However, individual differences in the restoration of lost spines were correlated with behavior 2 to 7 days after treatment, suggesting that spinogenesis may be important for the long-term maintenance of these effects. To test this, we used a photoactivatable probe to selectively reverse the effects of ketamine on spine formation in the PFC and found that the newly formed spines play a necessary and specific role in sustaining ketamine’s antidepressant effects on motivated escape behavior. By contrast, optically deleting a random subset of spines unrelated to ketamine treatment had no effect on behavior.

CONCLUSION

Prefrontal cortical spine formation sustains the remission of specific depression-related behaviors after ketamine treatment by restoring lost spines and rescuing coordinated ensemble activity in PFC microcircuits. Pharmacological and neurostimulatory interventions for enhancing and preserving the rescue of lost synapses may therefore be useful for promoting sustained remission.

Why is ketamine an antidepressant?

A better understanding of the mechanisms underlying the action of antidepressants is urgently needed. Moda-Sava et al. explored a possible mode of action for the drug ketamine, which has recently been shown to help patients recover from depression (see the Perspective by Beyeler). Ketamine rescued behavior in mice that was associated with depression-like phenotypes by selectively reversing stress-induced spine loss and restoring coordinated multicellular ensemble activity in prefrontal microcircuits. The initial induction of ketamine’s antidepressant effect on mouse behavior occurred independently of effects on spine formation. Instead, synaptogenesis in the prefrontal region played a critical role in nourishing these effects over time. Interventions aimed at enhancing the survival of restored synapses may thus be useful for sustaining the behavioral effects of fast-acting antidepressants.

Structured Abstract

INTRODUCTION

Depression is an episodic form of mental illness, yet the circuit-level mechanisms driving the induction, remission, and recurrence of depressive episodes over time are not well understood. Ketamine relieves depressive symptoms rapidly, providing an opportunity to study the neurobiological substrates of transitions from depression to remission and to test whether mechanisms that induce antidepressant effects acutely are distinct from those that sustain them.

RATIONALE

Contrasting changes in dendritic spine density in prefrontal cortical pyramidal cells have been associated with the emergence of depression-related behaviors in chronic stress models and with ketamine’s antidepressant effects. But whether and how dendritic spine remodeling is causally involved, or whether it is merely correlated with these effects, is unclear. To answer these questions, we used two-photon imaging to study how chronic stress and ketamine affect dendritic spine remodeling and neuronal activity dynamics in the living prefrontal cortex (PFC), as well as a recently developed optogenetic tool to manipulate the survival of newly formed spines after ketamine treatment.

RESULTS

The induction of depression-related behavior in multiple chronic stress models was associated with targeted, branch-specific elimination of postsynaptic dendritic spines and a loss of correlated multicellular ensemble activity in PFC projection neurons. Antidepressant-dose ketamine reversed these effects by selectively rescuing eliminated spines and restoring coordinated activity in multicellular ensembles that predicted motivated escape behavior. Unexpectedly, ketamine’s effects on behavior and ensemble activity preceded its effects on spine formation, indicating that spine formation was not required for inducing these effects acutely. However, individual differences in the restoration of lost spines were correlated with behavior 2 to 7 days after treatment, suggesting that spinogenesis may be important for the long-term maintenance of these effects. To test this, we used a photoactivatable probe to selectively reverse the effects of ketamine on spine formation in the PFC and found that the newly formed spines play a necessary and specific role in sustaining ketamine’s antidepressant effects on motivated escape behavior. By contrast, optically deleting a random subset of spines unrelated to ketamine treatment had no effect on behavior.

CONCLUSION

Prefrontal cortical spine formation sustains the remission of specific depression-related behaviors after ketamine treatment by restoring lost spines and rescuing coordinated ensemble activity in PFC microcircuits. Pharmacological and neurostimulatory interventions for enhancing and preserving the rescue of lost synapses may therefore be useful for promoting sustained remission.



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Ketamine Virginia Link

Long known as a party drug, ketamine now used for depression, but concerns remain

A decades-old anesthetic made notorious as a party drug in the 1980s is resurfacing as a potential “game-changing” treatment for severe depression, patients and psychiatrists say, but they remain wary about potential long-term problems.

The Food and Drug Administration earlier this month OKd use of Spravato for patients with depression who have not benefited from other currently available medications. Spravato, the brand name given to the drug esketamine, is a molecule derived from ketamine — known as Special K on the club scene.

Ketamine has been shown in some studies to be useful for treating a wide variety of neurological disorders including depression. Regular, longtime use of it isn’t well understood, psychiatrists say, but the need for a new drug to treat depression is so great that the FDA put Spravato on a fast-track course for approval.

The drug likely will be commercially available in a few weeks, and patients already are requesting it. Restrictions around its use, though — the drug must be administered in a doctor’s office by providers who are certified with the company making it — mean it may be months before it’s widely available, and longer than that before insurers start paying for it.

“I don’t think we know at this point how effective it’s going to be,” said Dr. Craig Nelson, a psychiatrist at the UCSF Depression Center. “There have been a number of studies of ketamine, sometimes showing effects in people who were resistant to other drugs. If we can treat a different group of people, it would be a great advantage.”

Ketamine was developed in the 1960s as a surgical anesthetic for people and animals. The drug can cause hallucinations and a feeling of “dissociation” or unreality, and in the 1980s it took off as a party drug among people seeking those effects. It remained a common anesthetic, though, and in the early 2000s doctors began to notice a connection between ketamine and relief from symptoms of depression and other mood disorders.

Spravato is delivered by nasal spray, which patients give themselves in a doctor’s office. Patients must be monitored while they get the drug and for two hours after to make sure they don’t suffer immediate complications. At the start, patients will get the nasal spray twice a week for four weeks, then taper to regular boosters every few weeks for an indefinite period of time.

Studies of ketamine — and specifically of Spravato — have produced encouraging but inconsistent results. Psychiatrists say that, like most other antidepressants, the drug probably won’t help everyone with difficult-to-treat depression. But there likely will be a subset of patients who get substantial benefits, and that alone may make it an incredible new tool.

About 16 million Americans experience depression every year, and roughly a quarter of them get no benefit from antidepressants on the market. Thought scientists haven’t determined exactly how ketamine works on the brains of people with depression or other mood disorders, it appears to take a different path of attack than any drug already available. That means that people who don’t respond to other antidepressants may find this one works for them.

But a concern among some psychiatrists is that studies have suggested that ketamine may affect the same receptors in the brain that respond to opioids. Ketamine and its derivations may then put patients at risk of addiction — but research so far hasn’t explored that kind of long-term effect.

“There might be some potential problems if you used it too aggressively,” said Dr. Alan Schatzberg, director of the Stanford Mood Disorders Center, who led the research that identified a connection with opioid receptors. “The issue is not so much the short-term use, it’s the repetitive use, and the use over time, as to whether there are going to be untoward consequences.

“It would be hard for me to recommend the use of this drug for chronically depressed people without knowing what the endgame is here,” he added.

Dr. Carolyn Rodriguez, a Stanford psychiatrist who was part of the studies of ketamine and opioid receptors, said she shares Schatzberg’s concerns. But she’s been studying the use of ketamine to treat obsessive-compulsive disorder, and for some patients the results have been so remarkable that the benefits may exceed the risks.

“When I gave ketamine to my first patient, I nearly fell off my chair. Somebody said it was like a vacation from their OCD, and I was just, ‘Wow, this is really possible,’” Rodriguez said. “I want to make sure patients have their eyes wide open. I hope (the FDA approval) spurs more research, so we can really inform consumers.”

Though the new nasal spray is the first formal FDA approval of a ketamine-derived drug, psychiatrists have been using the generic anesthetic for years to study its effect on depression and other mood disorders.

In recent years, clinics have opened around the country offering intravenous infusions of ketamine to people with hard-to-treat depression and other problems. These treatments aren’t specifically FDA-approved but are allowed as off-label use of ketamine. The clinics have faced skepticism from some traditional psychiatrists, but there’s a growing ream of anecdotal evidence that the ketamine IVs work — for some people.

Aptos resident Mary, who suffers from depression and other mood disorders and asked that her last name not be used to protect her privacy, said the already available antidepressants weren’t keeping her symptoms at bay, and she frequently felt “one step away from the abyss.” When she first heard about ketamine, from a support group for people with depression and other mood disorders, she was hesitant.

“I kind of hemmed and hawed, because I’d heard that K was a street drug,” Mary said. “But then I said, ‘What do I have to lose?’ So I went and did it.”

The results were quick: Within four days, “the cloud had lifted,” she said. More than a year later, she is still feeling good with regular infusions every three or four weeks. During the ketamine infusion, Mary said she’ll feel the dissociation, which she described as feeling like she’s viewing the world around her as though it were a movie and not her own life.

She said she’s pleased the FDA approved Spravato, though she hasn’t decided whether she’ll switch from the IV ketamine to the nasal spray. She hopes that the FDA approval will give some validation to ketamine and encourage others to try it.

Mary gets her infusions at Palo Alto Mind Body, where Dr. M Rameen Ghorieshi started offering ketamine two years ago. He’s certified with the maker of Spravato — Janssen Pharmaceuticals, a branch of Johnson and Johnson — to provide the drug, though he doesn’t know when he’ll actually start giving the nasal spray to patients.

Ghorieshi said that although he’s been offering IV ketamine for more than two years, he shares his colleagues’ wariness of the long-term effects of regular use of the drug. He hopes FDA approval will encourage further research.

“At this point we’ve done 1,000 infusions. The outcomes have exceeded my own expectations,” Ghorieshi said. “But anecdotes are not clinical trials. I approach this very cautiously. What I don’t want is 20 or 30 years from now to look back and say, ‘What did we do?’”



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Call NOVA Health Recovery at 703-844-0184 for a free consultation for a Ketamine infusion. No referral needed. We offer intranasal Ketamine follow up therapy as well. Alexandria, Va 22306.

Call NOVA Health Recovery at 703-844-0184 for a free consultation for a Ketamine infusion. No referral needed. We offer intranasal Ketamine follow up therapy as well. Alexandria, Va 22306.

From Popular Anesthetic to Antidepressant, Ketamine Isn’t the Drug You Think It Is

An hour before we spoke, Darragh O’Carroll, an emergency room physician from Hawaii, had just given an elderly patient a sedating shot of ketamine. The man had pneumonia and was acting confused and fidgety, making him hard to treat.

“Not only it was a pain control for him when I was putting needles into his neck, but it also kept him still,” O’Carroll says. “And with very minimal risk of lowering his blood pressure.”

Ketamine’s use as an anesthetic — and not as a party drug — is widespread, though not commonly known. In fact, the World Health Organizationestimates ketamine is the most widely used anesthetic in the world and keeps it on their list of essential medicines, a category of drugs that all developed countries should have on hand.

O’Carroll has described ketamine as his “favorite medicine of all time” in an article for Tonic, not only because the anesthetic is incredibly safe and effective, but also because of its versatility. It’s most widely used in surgery, but could also help treat severe asthma, chronic pain, and may even possess anti-tumor properties. In the last two decades, ketamine has also emerged as a potent antidepressant, able to treat symptoms of some mental illnesses in less than 72 hours.

“I think the more research that goes into ketamine, the more uses that we find for it,” O’Carroll says.

From PCP to Painkiller

Ketamine’s story begins with a drug called PCP. Yes, that PCP — phencyclidine or so-called “angel dust,” a drug that when smoked can cause a trance-like state, agitation and out-of-body hallucinations. After it was first synthesized by medicinal chemist Victor Maddox in 1956, the drug was briefly approved as an anesthetic by the FDA for its sedative properties. In tests with a wild rhesus monkey, for example, researchers put their fingers in the previously aggressive animal’s mouth and watched its jaw remain slack.

But while it was safe and effective for pain relief, the side effects of PCP soon became too obvious to ignore.

Some patients under the influence of PCP would feel like they lost their arms or legs or that they were floating in space. It could also cause seizures and delirium. Scientists began seeking a shorter-acting anesthetic without convulsant properties. In 1962, chemistry professor Calvin Stevens discovered a PCP analogue that fit the bill: ketamine.

Ketamine is a potent, sedating painkiller that can cause amnesia and is mostly used in surgery and veterinary medicine. During the Vietnam Invasion, ketamine saw widespread use in the U.S. military because it has several advantages over opioids. First, unlike morphine, ketamine doesn’t suppress blood pressure or breathing. It also doesn’t need to be refrigerated, making it useful in the field or in rural areas that don’t have access to electricity.

Ketamine’s benefits extend beyond use as an anesthetic, though — in some cases it can serve as a balm for the mind as well. A 2008 analysis found that burn victims who were given ketamine were less likely to develop symptoms of post-traumatic stress disorder, even if their injuries were more severe. Those findings have been replicated, such as a 2014 clinical trial of 41 patients, who saw their PTSD symptoms diminish within 24 hours, an effect that lasted for two weeks.

“When somebody gets one of their limbs dramatically blown off or is shot in the face, it’s a very traumatic event,” O’Carroll says. In such a situation, giving ketamine not only provides instant pain relief, it could prevent long-lasting trauma.

Because its chemical structure is so similar to PCP, ketamine can still give lucid hallucinations, such as feeling that your mind has separated from the body — a dissociative state users sometimes call a “K-hole.” One recent study based on users’ written reports even indicated that this kind of experience might be a close analogue to a near-death experience. However, these dissociative states only happen at high doses — the amount of ketamine used to for surgery and to treat depression is typically much lower.

But ketamine’s side effects are less common and easier to manage than PCP. In fact, ketamine is one of the safest drugs used in medicine today and can even be given to young children. For example, ketamine was used to sedatethe boys’ soccer team trapped in a cave in Thailand last year. Putting the kids in a tranquilized state made it easier to rescue them, and ketamine is safer than the opioids or benzodiazepines that are also commonly used as sedatives.  

Ketamine as Antidepressant

But it wasn’t until the 1990s that what could turn out to be ketamine’s most important function was discovered. A team from Yale University School of Medicine was examining the role of glutamate, a common neurotransmitter, in depression, and discovered something remarkable: ketamine could rapidly relieve depression symptoms.

“To our surprise, the patients started saying, they were better in a few hours,” Dennis Charney, one of the researchers, told Bloomberg. This rapid relief was unheard of in psychiatry.

Glutamate is associated with neural plasticity, our brain’s ability to adapt and change at the level of the neuron. Ketamine blocks certain glutamate receptors, but not others, and the end effect could be to promote the growth of new neurons while protecting old ones. This could explain how ketamine can help reset the brain, though the theory hasn’t yet been definitively proven.

The prescription meds currently on the market for depression have some major drawbacks. Drugs like Prozac or Wellbutrin can take a few weeks or months to kick in while worsening symptoms in the short term — not a good combination, especially for someone who is extremely depressed, or even suicidal.

It took around a decade for mainstream science to take notice of these early ketamine-depression studies. But once it did, ketamine clinics began popping up all across North America, offering fast relief for depression, anxiety and other mental illnesses. Patients are given an infusion — an IV drip that lasts about an hour — and many people, but not everyone, have seen rapid relief of their symptoms.

Suddenly, ketamine infusions became trendy, though the science to back up some of the medical claims is still inconclusive, according to STAT. However, ketamine infusions are rarely covered by insurance, although that is changing. A typical session can run $700, with many patients taking six sessions or more. But many of these patients have so-called treatment-resistant depression. They’ve tried other medications or therapies without success and some see ketamine as a last resort.

Steven Mandel, a clinical psychologist and anesthesiologist, has used ketamine on patients since it first came on the market around 50 years ago. In 2014, he began using it for patients with depression and opened Ketamine Clinics of Los Angeles, one of the oldest and largest clinics in the country. They’ve done over 8,000 infusions so far.

“Our success rate is better than 83 percent,” Mandel says. For his clinic, success means a 50 percent improvement of depression symptoms for longer than three months.

Ketamine’s success as an antidepressant couldn’t help but attract the attention of major pharmaceutical companies as well. In 2009, Johnson & Johnson began developing their own version of the drug they called esketamine. Rather than an infusion through a vein, it’s dispensed through a nasal spray. The FDA approved their formulation in early March. It was thefirst drug in 35 years to fight depression using a different approach than traditional drugs.

“Esketamine is a giant step forward,” Mandel says. “It means we’re not going to be demonizing mind-altering substances used for therapeutic purposes. It opens the door to research on LSD, on psilocybin, on MDMA and many other agents that could possibly relieve a great deal of suffering.”

But many clinicians have raised concerns about long-term side effects, such as heart and bladder toxicity. Others have been critical of esketamine, saying there isn’t enough data yet to suggest the drug is safe or effective. Husseini Manji, a neuroscientist who helped develop the drug for Johnson & Johnson at their subsidiary Janssen, has pushed back against these claims.

“When you line up the totality of the studies, it was really an overwhelming amount of data that was all in the same direction,” Manji says in a call. Though just two of the five late-state clinical trials showed significant results, the changes in mood in the three that fell short were “almost identical in magnitude” to the others, Manji says. It was enough for the drug to meet standards for FDA approval.

We can probably expect other ketamine-related drugs to come to market soon. ATAI Life Sciences, a company funding research on the use of magic mushrooms for depression, is developing their own ketamine depression drug. The pharmaceutical company Allergan also developed rapastinel, another ketamine-like drug, though it failed to show any real benefits for patients in later trials. Manji says this is unfortunate for people who could be helped by these kinds of drugs.

“From a patient standpoint, we were hoping it would work,” he says, even though he was not involved in rapastinel’s development. “But sometimes if you really haven’t got the mechanism right and you haven’t really threaded the needle, then sometimes you don’t see these results.”

Drug of Abuse?

Even though ketamine’s medical uses are well-established, most people have only heard of ketamine in the context of a party drug. Because of this bad reputation — and what’s perceived as growing misuse of the drug — several countries, such as China and the UK, have tried to place greater restrictions on ketamine. This would make it harder to study and more expensive in clinical use.

“If it was to ever be rescheduled, places that would be first affected would be you know places that need it most,” O’Carroll says. The WHO has asked at least four times for countries to keep access to ketamine open. “The medical benefits of ketamine far outweigh potential harm from recreational use,” Marie-Paule Kieny, assistant director general for Health Systems and Innovation at WHO, said in 2015.

So far, no countries have put greater restrictions on ketamine, and that’s probably a good thing. Ketamine has a rich history, but its future is still being written.



KETAMINE CENTER NORTHERN VIRGINIA | 703-844-0184 | NOVA HEALTH RECOVERY | SPRAVATO KETAMINE NASAL SPRAY CENTER |ALEXANDRIA, VA 22306 | KETAMINE FOR DEPRESSION AND PTSD | 22304 |20176 | 703-844-0184 | 22101 | 22102 | FAIRFAX KETAMINE INFUSION CENTER 22304 | DR. SENDI | Ketamine and OCD, PTSD, Depression, Anxiety



Call NOVA Health Recovery at 703-844-0184 for a free consultation for a Ketamine infusion. No referral needed. We offer intranasal Ketamine follow up therapy as well. Alexandria, Va 22306.

Call NOVA Health Recovery at 703-844-0184 for a free consultation for a Ketamine infusion. No referral needed. We offer intranasal Ketamine follow up therapy as well. Alexandria, Va 22306.

Ketamine: A Promising Novel Therapy for Anxiety and PTSD

Ketamine was originally approved by the US Food and Drug Administration (FDA) as an anesthetic, but is increasingly being used to treat mood disorders, such as treatment-resistant depression, anxiety disorders, and post-traumatic stress disorder (PTSD).1,2 Several studies have also found it to be effective for treating suicidal ideation.3,4

“Ketamine can play an important role in the treatment of anxiety disorders,” according to Prakash Masand, MD, co-founder, chairman, and CEO of Centers of Psychiatric Excellence (COPE) (https://www.copepsychiatry.com) and adjunct professor at the Academic Medicine Education Institute, Duke-National University of Singapore Medical School (Duke-NUS).

“Nowadays, people with anxiety disorders are treated either with a generic antidepressant, such as an SSRI (selective serotonin reuptake inhibitor), an SNRI (selective norepinephrine reuptake inhibitor), or a benzodiazepine and if they don’t respond to one of these, they get a trial of another or several more,” Dr Masand said.

However, between 30% and 40% of these patients will not achieve remission, despite 3 or 4 different traditional agents, and even with evidence-based nonpharmacologic therapies, such as cognitive behavioral therapy (CBT) or mentalization-based therapy (MBT), he noted.

“No good current strategies are available for these non-responders, so novel agents are being studied — including ketamine, which is accumulating an evidence base as [being] rapidly effective for an array of anxiety disorders, including social anxiety disorder (SAD) and PTSD,” he said.

How Does Ketamine Work?

A growing body of evidence points to the role of glutamate, a widely distributed excitatory neurotransmitter, in mediating response to stress and the formation of traumatic memories.2 Ketamine is an ionotropic glutamatergic N-methyl-d-aspartate (NMDA) receptor antagonist. Its antidepressant and anti-anxiety effects are presumed to occur through activating synaptic plasticity by increasing brain-derived neutrophic factor translation and secretion and also by inhibiting glycogen synthase kinase-3 and activating mammalian target of rapamycin signaling.5

Brain-derived neutrophic factor plays a role in behavioral responses to classical antidepressants, but the impact on synaptic plasticity may take several weeks to manifest. In contrast, ketamine-mediated synaptic plasticity changes appear to occur within a matter of hours after ketamine administration.5

“The current thinking is that eventually, 6 to 12 weeks after initiating treatment with traditional antidepressants, dendritic growth and increased synaptic connections occur but with ketamine, these can occur within 24 hours of the infusion,” Dr Masand said.

Ketamine and Anxiety: An Increasing Evidence Base

“Ketamine has been studied and shown [to be] effective with an array of anxiety disorders, including SAD, general anxiety disorder (GAD), and PTSD, although the data on its effectiveness in obsessive compulsive disorder (OCD) are more mixed,” Dr Masand observed.

GAD/SAD

  • A small study of patients with GAD and/or SAD (n=12) compared 3 ascending ketamine doses to midazolam. Each was given at 1-week intervals, with midazolam counterbalanced in dosing position across patients. Ketamine was found to dose-dependently improve scores on the Fear Questionnaire. Moreover, it’s impact on decreasing theta frequency in the right frontal sites assessed via  electroencelphalogram (EEG) was comparable to that of conventional anxiolytics.6
  • Glue et al evaluated the efficacy and safety of ketamine in 12 patients with refractory GAD and/or SAD who were not currently depressed using an ascending single-dose at weekly intervals study design. Within 1 hour of dosing, patients reported reduced anxiety, which persisted for up to 7 days.7
  • A continuation of that study evaluated the impact of maintenance treatment ketamine in patients with GAD and/or SAD (n=20) and found that 18 of the 20 patients reported ongoing improvements in social functioning and/or work functioning during maintenance treatment. The researchers concluded that maintenance therapy ”may be a therapeutic alternative for patients with treatment-refractory GAD/SAD.”8

“What is interesting about this study is that the impact of just one infusion lasted for 14 weeks, suggesting that patient[s] with anxiety disorders might have longer maintenance of response than patients with major depression, where the response has been maintained for only one week,” Dr Masand commented.

Anxious Depression

  • A study of patients with anxious and non-anxious bipolar depression (n=21 for both groups) found that both anxious and non-anxious patients with bipolar depression had significant antidepressant responses to ketamine, although the anxious depressed group did not show a clear antidepressant response disadvantage over the non-anxious group.9 “Given that anxiety has been shown to be a predictor of poor treatment response in bipolar depression when traditional treatments are used, our findings suggest the need for further investigations into ketamine’s novel role in the treatment of anxious bipolar depression.,” the investigators concluded.9

Related Articles

OCD

  • An open-label trial of ketamine in 10 patients with treatment-refractory OCD found that ketamine’s effects on OCD symptoms, in contrast to depressive symptoms, did not seem to persist or progress after the acute effects of ketamine had dissipated.10
  • On the other hand, another randomized controlled trial (RCT) of 15 patients with OCD found that anti-OCD effects from a single intravenous dose of ketamine persisted for more than 1 week in some patients with OCD with constant intrusive thoughts, demonstrating that “a drug affecting glutamate neurotransmission can reduce OCD symptoms without the presence of an [SSRI].”11

PTSD

In PTSD, there is “mounting evidence for a role of the excitatory neurotransmitter glutamate in stress responsiveness, the formation of traumatic memories, and the pathophysiology of PTSD, raising the possibility of identifying novel glutamatergic interventions for this disorder.”12

  • One double-blind study demonstrated that infusion of ketamine rapidly and significantly reduces symptom severity in patients with  PTSD compared with midazolam.2
  • Another study found that administration of ketamine immediately after witnessing a traumatic event has been shown to prevent the enhancement of passive avoidance learning in mice.13Ketamine may thus target the mechanisms involved in the consolidation of traumatic memory and may enable the brain to reconsolidate memory and release trauma.14
  • A case study of a child with PTSD reported remission from behavioral dysregulation after receiving procedural ketamine.15

Drawbacks and Potential Adverse Effects

The main concern regarding the use of ketamine for anxiety disorders is the lack of a road map regarding maintenance, Dr Masand noted.

“At COPE, we have found that roughly 30% to 40% of our patients being treated with ketamine require maintenance infusions, and we highly personalize this approach so that patients can identify early signs of recurrence or relapse and we can devise a treatment schedule to prevent them,” he said.

Some patients continue treatment with pharmacotherapy, including standard antidepressants, benzodiazepines, or a mood stabilizer such as valproate and some patients become more receptive to psychotherapies such as CBT,” he stated.

However, “there is very little data regarding what happens long-term in this patient population.”

“Most side effects are mild and transient,” Dr Masand reported. “Patients must be monitored because of potential increases in blood pressure and pulse.”

Additional adverse events include nausea or vomiting, which are also mild and transient. Patients may be pre-treated with prophylactic anti-nausea medication, such as ondansetron, to pre-empt these symptoms, he said.

Some patients experience dissociation, or an out-of-body experience, which is also usually transient but seen by some patients as “annoying,” he noted. “Dissociative experiences are sometimes seen as a biomarker for insufficient response and suggest that the dose should be increased.”

Providers should be aware that cystitis and lower urinary tract pathologies (eg, detrusor over-activity) have been reported in long-term ketamine users, but typically only at high doses.16

Ketamine’s psychedelic effects make it a” popular recreational drug.”16 At lower doses, the predominant effects are stimulating, and users experience mild dissociation with hallucinations and a distortion of time and space. However, higher doses can induce more severe, schizophrenia-like symptoms and perceptions.16 Although these effects resolve rapidly, long-term use “can cause more pronounced and persistent neuropsychiatric symptoms. For this reason, ketamine should be “used cautiously with other drugs that alter mood and perception, including alcohol, opioids, benzodiazepines and cannabis.”16

Promising Role

“Ketamine for treatment-resistant depression has a robust evidence base and a rapidly-growing evidence base for its use in anxiety disorders,” Dr Masand said.

“Given the gaps in current treatment, this promising agent is occupying a more promising role in treatment of anxiety disorders, such as PTSD. Considering how common PTSD is, ketamine can make an important difference for a large number of people who suffer from this debilitating condition,” he concluded.

First Person Account of Ketamine Therapy: An Interview with Kimberly Palmer

To gain insight into the experience of ketamine treatment in a person with depression and anxiety, Psychiatry Advisor interviewed Kimberly Palmer of Los Angeles, California. Ms Palmer received treatment at the Ketamine Clinics of Los Angeles (https://www.ketamineclinics.com). Ms Palmer works as a program manager for a consulting company where she organizes and runs corporate events for small groups.

Psychiatry Advisor: What made you decide to pursue ketamine treatment?

Ms Palmer: I was raised in an abusive home, and as an adult I had severe major depression, as well as anxiety. I was treated with medications, such as antidepressants, but they had many adverse events and they ended up making me feel like a zombie, so I discontinued them. I managed okay for a while, but then I had another major depressive episode.

I was receiving psychotherapy at the time and it was only moderately helpful — not enough to stop the episode. Fortunately, I knew someone who works at a ketamine clinic. She told me how many patients had been helped by ketamine and I was interested, mostly because the adverse events of ketamine seemed mild and are not long-term.

Psychiatry Advisor: What were your experiences during your infusion?

Ms Palmer: I felt incredible during the infusion. The best way I can describe it is by referring to the movie Avatar, specifically the scene in which the protagonist is walking through a jungle at night for the first time and touching all the plants, which light up with pretty colors—very vivid, colorful, and not linear. There was the sensation of being on a sort of roller coaster, riding through different scenes.

At one point, it felt as though my chair was on a cloud. Then suddenly, the chair disappeared and I was floating on the cloud. It was a wonderful experience.

Psychiatry Advisor: How did the ketamine treatment affect you afterwards?

Ms Palmer: After only one treatment, it was as if a switch had flipped in my brain that allowed me to digest things and move beyond my trauma. Before the infusion, a lot of what was going on with me had to do with self-esteem issues and negative self-talk. These were behaviors learned over many years. After the infusion, the negative self-talk immediately disappeared. All of those thoughts — such as telling myself I am not good enough — that were preventing me from working through emotional issues, were resolved. I was able to start looking at things more objectively rather than taking them personally, and not take on responsibility for other people’s emotions and reactions.

I am currently working with a therapist and a life coach to help me feel more comfortable with communication because I was raised not to ask for things and to put up with anything I’m asked to do. As a result, I have developed a much more positive outlook of myself and the world.

Psychiatry Advisor: How many ketamine treatments have you had?

Ms Palmer: Over a 6-month period I had 6 treatments, which were all very helpful. Then, 6 months after the conclusion of this first series of treatments, some new issues came up, so I received 2 more — one regular 60-minute treatment and one extended 90-minute treatment.

Recently, with the holidays coming up, I decided to pre-empt the effect of some stressors and have another treatment. My most recent infusion took place the day after my father passed away. I noticed that during the infusion, I was able to steer myself away from negative thoughts about that issue. Although I cannot control what visions or experiences I might have, I do have some control over the direction of my thoughts and the after-effects have been positive and helpful.

Psychiatry Advisor: Did you have any adverse events from the treatments?

Ms Palmer: I had no negative physical effects. I had one mild bad reaction, when I came to the treatment session in an agitated state because I had gotten into a fight with someone right before. I was sad and crying  by the time I finished the infusion. But I was in a bad headspace before I even walked into the room. And my experience was not scary, only sad.

Psychiatry Advisor: What impact has your treatment had on your day-to-day life?

Ms Palmer: My depression had interrupted my schooling. I was in school for 3 and a half years and then I hit a roadblock. After the treatments, I was able to complete my studies and graduated with a BA in business administration and management.

My job is stressful. I counterbalance the stress with hobbies like surfing and photography. But there are still stressors, and I have a dog who is reaching the end of life, which is affecting me. The ketamine treatments have helped me to manage those stressors. 

References

  1. Sanacora G, Frye MA, McDonald W, et al. A consensus statement on the use of ketamine in the treatment of mood disordersJAMA Psychiatry. 2017;74(4):399-405.
  2. Feder A, Parides M, Murrough JW, et al. Efficacy of intravenous ketamine for treatment of chronic posttraumatic stress disorder: a randomized clinical trialJAMA Psychiatry. 2014;71(6):681-688.
  3. Murrough JW, Soleimani L, DeWilde KE, et al. Ketamine for rapid reduction of suicidal ideation: a randomized controlled trialPsychol Med. 2015;45(16):3571-3580.
  4. Wilkinson ST, Ballard ED, Bloch MH, et al. The effect of a single dose of intravenous ketamine on suicidal ideation: a systematic review and individual participant data meta-analysisAm J Psychiatry. 2018;175(2):150-158.
  5. Schwartz J, Murrough JW, Iosifescu DV. Ketamine for treatment-resistant depression: recent developments and clinical applicationsEvid Based Ment Health. 2016;19(2):35-38.
  6. Shadli SM, Kawe T, Martin D, McNaughton N, Neehoff S, Glue P. Ketamine effects on EEG during therapy of treatment-resistant generalized anxiety and social anxiety [published online April 24,2018]. Int J Neuropsychopharmacology. doi:10.1093/ijnp/pyy032
  7. Glue P, Medlicott NJ, Harland S, et al. Ketamine’s dose-related effects on anxiety symptoms in patients with treatment refractory anxiety disorders. J Psychopharmacol. 2017;31(10):1302-1305.
  8. Glue P, Neehoff SM, Medlicott NJ, Gray A, Kibby G, McNaughton N. Safety and efficacy of maintenance ketamine treatment in patients with treatment-refractory generalised anxiety and social anxiety disordersJ Psychopharmacol. 2018;32(6):663-667.
  9. Ionescu DF, Luckenbaugh DA, Niciu MJ, Richards EM, Zarate CA. A single infusion of ketamine improves depression scores in patients with anxious bipolar depressionBipolar Disord. 2014;17(4):438-443.
  10. Bloch MH, Wasylink S, Landeros-Weisenberger A, et al. Effects of ketamine in treatment-refractory obsessive-compulsive disorderBiol Psychiatry. 2012;72(11):964-970.
  11. Rodriguez CI, Kegeles LS, Levinson A, et al. Randomized controlled crossover trial of ketamine in obsessive-compulsive disorder: proof-of-concept. Neuropsychopharmacology. 2013;38(12):2475-2483.
  12. Girgenti MJ, Ghosal S, LoPresto D, Taylor JR, Duman RS. Ketamine accelerates fear extinction via mTORC1 signalingNeurobiol Dis. 2016;100:1-8.
  13. Ito W, Erisir A, Morozov AObservation of distressed conspecific as a model of emotional trauma generates silent synapses in the prefrontal-amygdala pathway and enhances fear learning, but ketamine abolishes those effects. Neuropsychopharmacology. 2015; 40(11):2536-2545.
  14. Fattore L, Piva A, Zanda MT, Fumagalli G, Chiamulera C. Psychedelics and reconsolidation of traumatic and appetitive maladaptive memories: focus on cannabinoids and ketaminePsychopharmacology (Berl). 2018;235(2):433-445.
  15. Donoghue AC, Roback MG, Cullen KR. Remission from behavioral dysregulation in a child with PTSD after receiving procedural ketaminePediatrics. 2015;136(3):e694-e696.
  16. Li L, Vlisides PE. Ketamine: 50 years of modulating the mindFront Hum Neurosci. 2016;10:612.

Recommended For You



Ketamine Center Northern Virginia | 703-844-0184 | NOVA Health Recovery | Spravato Ketamine nasal spray Center |Alexandria, Va 22306 | Ketamine for depression and PTSD | 22304 |20176 | 703-844-0184 | 22101 | Arlington, Va Ketamine Infusion Center



Call NOVA Health Recovery at 703-844-0184 for a free consultation for a Ketamine infusion. No referral needed. We offer intranasal Ketamine follow up therapy as well. Alexandria, Va 22306.

Call NOVA Health Recovery at 703-844-0184 for a free consultation for a Ketamine infusion. No referral needed. We offer intranasal Ketamine follow up therapy as well. Alexandria, Va 22306.

VA to offer new ketamine-based nasal spray to help combat depression

The newest FDA-approved medication to treat severe depression, a nasal spray based on the anesthetic (and misused hallucinogenic party drug) ketamine, will soon be available to veterans treated within the Department of Veterans Affairs.

In a move that may help thousands of former service members with depression that has not improved with other treatments, VA officials announced Tuesday that the department’s doctors are now authorized to prescribe Spravato, the brand name for esketamine, a molecular variation of ketamine.

The decision to offer a drug hailed by many as a breakthrough in treatment for its speedy results — often relieving symptoms in hours and days, not weeks — shows the VA’s “commitment to seek new ways to provide the best health care available for our nation’s veterans,” Secretary Robert Wilkie said in a release.

“We’re pleased to be able to expand options for Veterans with depression who have not responded to other treatments,” Wilkie added.

The treatment will be available to veterans based on a physician’s assessment and only will be administered to patients who have tried at least two antidepressant medications and continue to have symptoms of major depressive disorder.

An estimated 16 million Americans have had at least one major episode of depression, and of those, 1 in 3 are considered treatment-resistant. In the veteran population of 20 million, the estimated diagnosis rate of depression is 14 percent — up to 2.8 million veterans. Between one-third and half of those veterans may be treatment-resistant.

The lack of effective medications for difficult-to-treat patients prompted the Food and Drug Administration to place esketamine on a fast track, expediting its review of the drug to ensure that it went to patent as soon as safely possible, according to administration officials.

“Controlled clinical trials that studied the safety and efficacy of this drug, along with careful review through the FDA’s drug approval process, including a robust discussion with our external advisory committees, were important in our decision to approve this treatment,” said Dr. Tiffany Farchione, acting director of the FDA’s Center for Drug Evaluation and Research Division of Psychiatry Products, in a release.

As with any other medication, there are risks. Spravato carries a boxed warning for side effects that include misuse, the reason it is administered under a doctor’s supervision. The list of side effects includes sedation and blood pressure spikes and disassociation, such as feelings of physical paralysis and out-of-body experiences. It also can cause suicidal thoughts and behaviors.

Acknowledging the dangers, FDA made esketamine available only through a restricted distribution system.

A veteran prescribed Spravato would inhale the nasal spray at a medical facility while under supervision of a medical provider, and would be monitored for at least two hours after receiving the dose. A typical prescription includes twice-weekly doses the first month, followed by a single dose weekly or biweekly as needed. Spravato cannot be dispensed for home use.

Spravato is made by Janssen Pharmaceuticals, a subsidiary of Johnson & Johnson. It is the first major antidepressant medication to hit the market in 30 years.



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