Tuesday, April 20, 2010
Some Background on the Psychedelic Renaissance
Ecstasy, MAPS, and Post-Traumatic Stress Disorder.
The psychedelic drugs, new and old, are not only among the most powerful ever discovered, but are also tremendously difficult to study and utilize responsibly. By the mid-1990s, rumors about Ecstasy (MDMA) toxicity were everywhere. Unlike Prozac, but very much like LSD, Ecstasy not only blocks serotonin uptake, but also causes the release of additional serotonin, much the way cocaine and amphetamine cause the release of extra dopamine.
A study conducted by neurologist George Ricaurte at John Hopkins University under NIDA sponsorship seemed to show conclusive evidence of neurotoxic damage to the serotonin 5-HT receptors in the brains of monkeys given large doses of MDMA. A follow-up study of 30 MDMA users (existing users, since researchers didn’t have government permission to give MDMA to test subjects) showed 30 per cent less cerebrospinal serotonin, compared to a control group. However, the Johns Hopkins team did not have any baseline measurements for the MDMA users, and other neurologists raised technical objections about various aspects of the study, including dosage levels. As was often the case in such studies, the monkeys had been given a whopping dose, compared to the typical raver’s dose. Ricaurte insisted that the amount of MDMA consumed by a typical user in one night of raving was possibly enough to cause permanent brain damage. The government estimates that 10 million Americans have taken Ecstasy.
That would seem to be the end of the story, and a sobering lesson for today’s youth—but that is not how it turned out. A few years later, Dr. Charles Grob, psychiatry professor at the UCLA School of Medicine, received the first FDA approval ever given for the administration of MDMA to human volunteers. The result of Grob’s testing was that none of the volunteers showed any evidence of neuropsychological damage of any kind. In testimony before the U.S. Sentencing Commission, which was considering harsher penalties for MDMA possession in 2001, Dr. Grob seriously questioned the methodology of the Ricaurte studies: “It is very unfortunate that the lavishly funded NIDA-promoted position on so-called MDMA neurotoxicity has inhibited alternative research models which would better delineate the true range of effects of MDMA, including its potential application as a therapeutic medicine.” Science retracted its coverage of the Ricaurte findings.
It was eventually discovered that Dr. Ricaurte’s monkeys had been injected with amphetamine, not with MDMA—a discovery that also nullified four other published papers. Dr. Ricaurte explained that some labels had been switched, and a Johns Hopkins spokesperson called the whole thing “an honest mistake.” The basic questions about Ecstasy remain unanswered. Is there a line that separates a conceivably therapeutic dose of Ecstasy for mental ills or addictive ills from a possibly brain-damaging run of several dozen high-dosage trips? Perhaps the permanently altered receptor arrays, if they exist, don’t affect cognition or emotions in any significant way over the long run. Still, the risks of overindulgence appear to be at least potentially higher than the risks of overindulging in LSD or Ibogaine. All of the psychedelics tend to be more self-limiting than other categories of psychoactive drugs, anyway. After two or three days, even the most die-hard raver or LSD head is usually ready to take a break.
Rick Doblin and others at the Multidisciplinary Association for Psychedelic Studies (MAPS) are now working with government investigators to pursue MDMA for the treatment of post-traumatic stress disorder. There are reports that very low doses of LSD sometimes have an antidepressant effect. One thing we know for certain is that people on SSRI medications or MAO inhibitors report that their experiences on LSD or Ecstasy are shorter and far less powerful than is typically the case. There appears to be some competition for receptor sites when Zoloft meets LSD. In contrast to the diminished psychedelic experience while on SSRIs, the older norepinephrine-active tricyclics like Tofranil and Norpramine reportedly serve to potentiate the LSD or MDMA experience. None of these combinations is a wise idea, due to uncertainties about the interactions.
Even DMT, which experienced trippers compared to being shot out of a cannon, has returned as a legitimate study subject. Dr. Rick Strassman, then with the University of New Mexico’s School of Medicine, received approval for clinical testing of DMT. Strassman was drawn to the subject because of the molecule’s natural occurrence in the brain (which makes every man, woman, and child in America a drug criminal, chemically speaking). He gave DMT to 60 human volunteers over a study period of five years. Strassman was primarily interested in near-death experiences and mystical experiences. None of the supervised DMT sessions evidently resulted in any detectable harm to the participants. Strassman presents his views on the medical use of DMT in his book, DMT: The Spirit Molecule.
Adapted from The Chemical Carousel: What Science Tells Us About Beating Addiction by Dirk Hanson © 2008, 2009.
Graphics Credit: http://hightimes.com/