Hi all. Did you probably know that mephedrone impairs memory? Mephedrone use has been shown to be associated with impaired short-term and verbal memory in humans. In rodents, mephedrone causes acute working memory deficits and impaired object recognition, and selectively impairs fear-motivated contextual memory mephedrone.com . If you want to know even more about the problems with this drug, go here lovely blog about 4-methylmethcathinone