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Professor Val Curran (Â鶹´«Ã½ÊÓƵÍøÕ¾ Clinical, Educational and Health Psychology) said that any effects on memory are likely to be small and transient.

"The general agreement that is emerging about ecstasy is that while you are using the drug, you might expect a very subtle memory impairment but it's probably not significant in the real world," she said.