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Home Exclusive Psychopharmacology Psychedelic Drugs MDMA

Previous antidepressant use may blunt the effectiveness of MDMA-assisted psychotherapy for PTSD

by Eric W. Dolan
March 8, 2021
in MDMA, Mental Health, Psychedelic Drugs
(Image by Gerd Altmann from Pixabay)

(Image by Gerd Altmann from Pixabay)

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New research suggests that MDMA-assisted therapy for the treatment of posttraumatic stress disorder (PTSD) is less effective among those who have recently used selective serotonin reuptake inhibitors (SSRIs), a common psychiatric medication. The findings have been published in the journal Psychopharmacology.

“As a neuropharmacologist, I think about how drugs act in the brain with receptor targets,” said study author Allison Feduccia, the director of the education platform Psychedelic.Support. “We know MDMA and antidepressants (selective serotonin reuptake inhibitors, in particular) bind to the same receptors in the brain.”

“It’s been known that if you give an SSRI at the same time as MDMA, the effects of MDMA are reduced. It wasn’t known how prior use of this class of antidepressants would affect how people feel when they take MDMA.”

“This topic is important because MDMA may get approved as a treatment for PTSD and many people with this condition are prescribed SSRIs. We want to know if the treatment outcomes could be impacted by other medications to give a person the best chance for success with these treatments,” Feduccia explained.

For their study, the researchers analyzed data from previously published phase 2 clinical trials that had found evidence that MDMA-assisted psychotherapy reduced PTSD symptom severity. They compared data from 16 participants who had tapered off reuptake inhibitors prior to the trials to 34 participants who had not been taking the medication.

Among those who tapered off antidepressants, only 25% no longer met the diagnostic criteria for PTSD after MDMA-assisted therapy. In contrast, about 64% of participants who were not taking the medications no longer met the diagnostic criteria for PTSD after treatment.

The findings indicate that some medications “can potentially impact the effects someone feels when they take a psychedelic substance,” Feduccia told PsyPost. “This study indicated that prior use of specific medications may alter the treatment outcomes for MDMA-assisted psychotherapy. But individuals shouldn’t stop using prescription medications without first talking to their health providers first.”

MDMA typically results in increases in systolic and diastolic blood pressure, but the expected increases in blood pressure were lower among those who had discontinued SSRIs.

“The paper we published showed lower blood pressure readings during MDMA sessions for participants who had tapered reuptake inhibitors,” Feduccia explained. “This objective evidence suggests the effects of MDMA were not as strong for these individuals. Participants could have also been experiencing symptoms from discontinuing their medications, which is common for people after stopping antidepressants.”

Because of the study’s relatively small sample size and some potentially cofounding factors, the researchers consider the results to be preliminary.

“Ongoing MDMA trials and clinical use (if approved) will provide more data from a larger number of people,” Feduccia said. “Once there is more data available, the analyses can look at each drug in the re-uptake inhibitor class, amount of time spend during the taper periods, and the amount of time since the medication was discontinued. This information will inform clinical practice to help PTSD suffers get the most out of MDMA therapy treatments.”

The study, “Discontinuation of medications classified as reuptake inhibitors affects treatment response of MDMA-assisted psychotherapy“, was authored by Allison A. Feduccia, Lisa Jerome, Michael C. Mithoefer, and Julie Holland.

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