A randomized placebo-controlled trial tested whether MDMA enhances fear extinction retention in healthy adults. Participants underwent fear conditioning, then received 100 mg MDMA or placebo before extinction training. Fear retention was tested 48 hours later. MDMA was well-tolerated with no serious adverse events. While the overall analysis showed no significant group difference in extinction retention between training and test sessions, a significantly larger proportion of the MDMA group retained extinction learning compared to the placebo group. The results provide a rationale for further research into MDMA's potential effects on fear extinction.
Black Americans reported more positive views of psychedelic-assisted therapy than White Americans after receiving brief psychoeducation about MDMA and psilocybin-assisted therapy. Among 294 adults (44% Black/African American or Mixed Race with Black ancestry, 56% White American; average age 36.3 years), psychoeducation increased interest and positivity across both groups. Greater depression and PTSD symptom severity was linked to higher baseline interest in both groups, and Black participants with more severe depression showed even greater interest and more positive views. The findings suggest that research groups, not potential participants, are responsible for diversifying clinical trial samples and that rebuilding trust and providing culturally attuned interventions is needed.