I used to be on anti-depressants. I was on both prozac and zoloft. However, I was switched to zoloft after about 60 days so I cannot say too much about it.
However, spending two and a half years on zoloft, I can say that it is an evil drug. It was addicting for me, meaning that when I would try to get off it, I would start to feel really disconnected. I was only able to quit using it during a bout of mono.
Also...the sexual side effects were awful. I couldn't cum if I had taken a pill that morning. So...if I knew I would be having sex or whatever, I would purposely not take my pill.
It makes me sick to see that zoloft is still being advertised on TV when there are much better, less-addictive drugs available. However...each person reacts differently. Definitely ask your doctor...do not be taking drugs from a friend as he/she may have a completely different type of depression than you and different drugs are made to treat specific types of depression.
Hope this helps...good luck
~Ryan