Cognitive function and mood in MDMA/THC users, THC users and non-drug using controls
Journal of Psychopharmacology March 1, 2006 C. T. J. Lamers, A. Bechara, M. Rizzo et al. 113 citations
People who use both MDMA (ecstasy) and marijuana (THC) report more depression and anxiety than those who use only THC or no drugs. Memory is impaired in both drug-using groups. MDMA/THC users have slower psychomotor speed and less mental flexibility than non-users. THC users show less mental flexibility and worse decision-making than non-users, but these deficits are similar to those in MDMA/THC users. The findings suggest that some cognitive impairments previously attributed to MDMA may actually be due to concurrent THC use, while MDMA use is specifically linked to increased depression and anxiety.