I'm not excusing her, of course, but ectstasy is a horrible substance and a serious neurotoxin. I find it easy to believe that a stupid teenager doing lots of it might do anything. Ecstasy's reputation as a fun club drug/love drug is the cause of much suffering.
Same goes for Twinkies.
In a class of working adults, mostly in their 30's, the subject of ecstasy came up. One person asked a man, "Have you ever taken it?" He said, "Every chance I get." He was always red-face and woozy looking. The whole class recoiled at his reply.