I don't have a question, but I have a source of information that some of you might find useful, as I've seen several questions with people asking for a specific type of drug that will enable a character to suffer certain consequences (eg. dying, going into a comatose, etc.) without the drug itself being extremely dangerous.
The Consumerist has an entry on 9 Legal Drugs (in the US) with Extremely Disturbing Side Effects. The threads in the comments section is also useful in finding out how other drugs have some adverse side-effects in patients. The info is very anecdotal, but it should be able to give you a good picture of what kind of drugs to use if you need to inflict a little death or torture to your characters.
I hope you find the link useful!