I thought for the longest time that I had a chemical imbalance (or other physical problem associated with depression or emotional instability). I even took two different kinds of anti-depressants. However, in the end, I found that relying on God and trusting His promises given to us through the Bible was the only thing that cured me of my problem. The pills seemed to work a little, but they had side effects and made me feel in some ways "fake" (as if my contentedness was because I was "drugged," which I was). The pills seemed to treat the symptoms, while trusting in God cured me of the problem (the source of the symptoms).

I'd recommend avoiding them.