Amy that is a very good question, thank you. I would guess that we all have suffered depression at some point in our lives. The answer is to deal with what is causing the depression, not turn to drugs legal or other wise.
Some get depressed over death, divorce, losing money, someone has hurt them, they feel they lack an ability, they are not pretty, too fat, too slim, cannot forgive themselves, and on and on. All that stems from sin. If you look into scripture there is a biblical way to deal with everything I mentioned and more and not a single thing is mentioned about seeking out a Doc and taking drugs.
Now with that let me say this. I understand that some people refuse to believe and use the biblical way to overcome and they may very well need to be suppressed with drugs so as not to harm themselves or another, but the drugs never cure them, they only suppress and they are not the biblical way to deal with it.