Treatment of depression is fixed by taking a step back and adjusting your life. Not taking a chemical expecting it to adjust it for you. It is a drug, which is being used everyday, and like every drug, you become immune over time, to the point it has little effect. Humans were not designed to take a chemical every day, why is it only in the last half century people have been fooled into taking this crap when real health has been mastered by the Chinese for over 3000 years.(Chi Qi-Gong) Get your energy channels flowing. It really does work.
Anti-depressants can often be looked at as the start of a long spiral down. Personally know people on using this stuff who all say it wears off over medium periods or time.
In terms of pilots flying using these pills, it needs to be a case by case basis in which each pilot is researched thoroughly as opposed to a single appointment.
Anti-depressants = sad reality of a not so uncommon modern life for some.