By Pat Anson

At a time when the medical and recreational use of ketamine is coming under more scrutiny from law enforcement, a new study highlights its potential value as a treatment for fibromyalgia pain.

Ketamine is an anesthetic drug that is only FDA-approved for depression and anesthesia. But in recent years ketamine infusions are increasingly being used “off-label” for severe chronic pain conditions such as Complex Regional Pain Syndrome (CRPS).

In a small systematic review (a study of studies), researchers in Brazil found that ketamine infusions were safe and effective in relieving fibromyalgia pain. The review was small – just 6 clinical trials involving 115 patients – because ketamine has rarely been considered as a treatment for fibromyalgia due to its potency. Ketamine infusions require constant medical supervision because they put patients into a temporary dream-like state that can lead to hallucinations and out-of-body experiences.

But the Brazilian researchers found the side effects from infusions were mild and short-term, with some fibromyalgia patients experiencing pain relief that lasted for days or weeks.

Fibromyalgia is a poorly understood condition that causes widespread body pain, fatigue, insomnia, brain fog and mood disorders. The FDA has approved only three medications for fibromyalgia, two antidepressants (Cymbalta and Savella) and a nerve drug (Lyrica), but many patients consider the drugs ineffective.

Could ketamine be another option?

“Ketamine infusions might be a reasonable therapeutic approach for short-term relief of symptoms but unsatisfactory at inducing long-term analgesia in FM (fibromyalgia) patients,” the Brazilian research team reported in Advances in Rheumatology. “Future studies that evaluate the safety and effectiveness of ketamine in FM are desired for long-term follow-up. In patients refractory to conventional therapy, ketamine infusions might be a reasonable therapeutic approach.”

A recent case study suggests ketamine does have potential as a long-term treatment. A 68-year-old woman with fibromyalgia experienced “significant, widespread pain relief” after receiving several ketamine infusions over a two-week period. She continued getting infusions twice a week for the next year.    

“Pain relief has persisted under this regimen, along with a demonstrable improvement in quality of life, a reduced use of morphine, and the cessation of anti-depressant medication. This case indicates that long-term ketamine infusions show promise for chronic pain management and that more longitudinal studies on this treatment are warranted,” researchers reported.

‘Targeting and Investigating Doctors’

The positive news about ketamine is being overshadowed by the investigation into the death of actor Matthew Perry, who drowned in a hot tub last year after getting three ketamine injections in one day – none of them while under medical supervision.  Five people, two of them doctors, were recently arrested in connection with Perry’s death, including an alleged drug dealer known as the “Ketamine Queen.”

Perry had long struggled with substance abuse issues, but federal prosecutors say the defendants “were more interested in profiting off Mr. Perry than caring about his well-being.”  The two doctors charged in the case both surrendered their DEA licenses and can no longer prescribe controlled substances.      

In a recent appearance on CBS’ Face the Nation, DEA Administrator Anne Milgram likened Perry’s death to the opioid crisis, claiming that his doctors were ultimately responsible.  

“It started with two unscrupulous doctors who were violating their oath, which is to take care of their patients, and instead supplying Matthew Perry with enormous quantities of ketamine in exchange for huge amounts of money. And then it switched to the street where Matthew Perry was buying the ketamine from two drug traffickers,” Milgram said.

“Every single day, (we) are targeting and investigating doctors, nurse practitioners, others who are violating this duty of trust to their patients by over prescribing medicine or prescribing medicine that isn't necessary.”

Milgram also claimed that ketamine “has a high potential” for addiction. While experts agree the drug can be abused, ketamine is not an opioid and does not suppress respiration, the leading cause of an overdose.