Imho medicating is a very, very bad idea.....eventually your body and brain don’t know what’s “normal” and what isn’t any more.
I always believe that if you are in that sort of state that you require medication for something as normal as sleep or positive feelings then you need to closely re-examine your life and thought processes.
A life style change may be what’s required.
Think about it, if a person is having to medicate to keep doing what they are doing then they shouldn’t be doing it......nature always gives you a clue