A controversial study linking MDMA to neurotoxicity in primates was retracted due to significant labeling errors, revealing that the subjects were actually injected with methamphetamine. While some rodent studies suggest potential neurotoxic effects at recreational doses, no conclusive evidence exists for humans or non-human primates when pure MDMA is used. Individual susceptibility to toxicity may vary, influenced by factors such as receptor differences and interactions with other substances.
