What was attributed to her death was an extreme dehydration as a result of the use of Ecstasy. What often happens is, when people under the influence of Ecstasy have the extreme dehydration, they then drink huge amounts of water. This, in turn, creates toxic effects as well and can be incredibly dangerous. I don't know the exact date, actually. To my knowledge, I don't know why, either.
Amphetamine psychoses can mimic schizophrenia, or symptoms of it.
The treatment is to just stop . It takes a solid year to really get clear, in terms of your thinking. To answer the second question, MDMA has no positive aspects of usage that I can see. There is the whole euphoria involved, and the tactile, touching, hugging and kissing, as I mentioned earlier. The problem is, there are no boundaries, and as a result, people act out sexually with people they would normally not rather be with.