MDMA enhances emotional empathy but reduces accuracy in recognizing negative facial expressions such as sadness, fear, and anger. No significant effects were found on cognitive empathy or recognition of happy expressions. These findings come from a meta-analysis of studies using the Multifaceted Empathy Test and the Facial Emotion Recognition Task. Understanding these nuanced effects may help optimize therapeutic applications and safety considerations for MDMA-assisted psychotherapy, which is currently under regulatory review for post-traumatic stress disorder.
Low to moderate doses of MDMA (less than 3 mg/kg), typical of recreational or therapeutic use, may not impair learning and memory as severely as high doses. In mice trained with a Pavlovian fear conditioning paradigm, doses from 0.1 to 8 mg/kg were tested. Immediate memory and long-term contextual and cued memory were assessed one week later. The findings help determine whether low doses are therapeutically viable without adverse cognitive effects.