Additionally, there's very little - if any - evidence they actually work the way they're purported to.
There are countless heartbreaking stories of people who were prescribed these drugs not knowing what they were subscribing to. In many cases, the effects of those drugs are worse than the symptoms they are supposed to alleviate. With "I Don't Wanna Be Me" there's even a song by Type O Negative (from Peter Steele's own experience with Prozac) about the devastating effects SSRIs can have on a person's life.
These drugs are handed out like candy while the physicians prescribing them often point-blank deny any side effects or even attribute those to the illness they are meant to treat.
I'd go as far as to say that prescribing these drugs for any but the most severe or otherwise untreatable cases violates the "First, do no harm." ethical principle of medicine.