Complex sentence: MDMA is occasionally known for being taken in conjunction with psychedelic drugs the more common combinations include MDMA combined with LSD, MDMA with psilocybin mushrooms, and MDMA with ketamine.
Split into simpler sentences: MDMA is occasionally known for being taken in conjunction with psychedelic drugs. The more common combinations include MDMA combined with LSD, MDMA with psilocybin mushrooms, and MDMA with ketamine.