A study conducted by German scientists has revealed that using the popular party drug Ecstasy (MDMA) can cause deterioration of memory:
Among Ecstasy users, the researchers found a deterioration in a memory task called paired associates learning, in which people memorize pairs of words or objects so that the presentation of one triggers the recall of the other. None of the other cognitive tasks showed significant differences between users and nonusers, Wagner said. The specificity of the deficit suggests damage to the hippocampus, he said, the part of the brain that is crucial for memory formation and recall.
(Another point of interest from the study: it’s apparently difficult to find MDMA users who don’t also smoke marijuana.)
Read More at LiveScience.