"Depressants" is just the name of a very broad category of drugs, all of which are made of different things. You would need to ask what a specific drug is made of for an actual answer.
Central nervous system depressants have been around longer than the human race.
alcohol is under the category of depressants
You don't take depressants. You take anti-depressants, which counters being depressed.
no, that would be ANTI-depressants....
Anti-depressants work differently for everyone but whenever I took it it made me lethargic.
Depressants slow (or depress) the actions of the lungs, heart, and other organs.
Depressants slow (or depress) the functioning of the entire body.
Stimulants and depressants have opposite effects on the brain. Stimulants activate the central nervous system, while depressants (as their name implies) depress it.
No.
depressants affect the heart rate by its heart rate
stimulants increase activity and depressants decrease activity.