(Quoting Angela here):
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"NO drug can "cause" someone to intentionally take their own
life. ......I'm a psych major and I learned this in school, from a
psychologist, if you're wondering whether this is true or whether
it's my own speculation just spouting off."
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This is my experience: I was given an antidepressant (not Zoloft, by the way) by my doctor. After only one dose I became an absolute zombie. I lost all normal feelings, all concern for my own life, all empathy for others. In fact, I temporarily became what the literature calls a sort of sociopath. Lucky for me that I stopped at one dose and stayed inside. Somehow I knew that the new me was terribly wrong and also dangerous, although with a second dose I would have been so dehumanized that I wouldn't have even cared. In fact, the realization of what I had turned into was so frightening and horrifying that I knew I would have to destroy myself if I remained that way. Desperate as I was to lift my depression (because I had tried many drugs without success), I still realized that I could suicide or kill on that drug. I suppose I was both Dr. Jekyl and Mr. Hyde at that crucial moment, or I couldn't have perceived what I had just become and stopped in time.

I hope not too many people have to die before it's believed and even taught that certain drugs, by themselves, can be life-threatening for some of the depressed persons for whom they are prescribed.