<<Disclaimer: Verify this information before applying it to your situation.>>

I've noticed there are many questions on this list about drugs, from
ingredients to side effects. Here is a website that will tell you all that
and more (Everything you ever wanted to know about a drug if you knew
enough to ask the right questions :)

http://www.rxlist.com/interact.htm

Try it; you'll like it. Good for actual heads (illegal drug users) too :) -vance