Yeah I wasn't too sure about coke really, I had a feeling it might not be in the same group as heroin and morphine etc.

It was quite a long time ago when I used ecstasy and I was under the impression it was MDMA cut with speed (amphetamine).  My days of experimentation are about 30 years in the past and I worry about damaging my brain these days, but it's sound advice for anyone else wanting to experiment.