I got some questions about depressants.?!

I got some questions about depressants.?

Could someone give the following info please:
1) Its dictionary definition
1) Some facts about it
3) Street Terms
4) Physical effects
5) Psychological effects
6) How it's used
7) How long does it stay in the body?
8) Its Overdose effects
9) Medical uses (if any)
10) Withdrawl symptoms
11) Ways to avoid experimentation
12) Long-term effects

Thanks in advance.

Don't you mean ANTIdepressants?

Have a look at the wiki page about antidepressants.

If you are talking about CNS depressants, that is a different thing. You would have to look up the various subclasses.

Please clarify your question.