Some even cause worse depression and even suicide. The main side effects are nausea, insomnia, anxiety, restlessness, decreased sex drive, dizziness, weight gain or loss, tremors, sweating, sleepiness, fatigue, dry mouth, diarrhea, constipation, headache, et cetera. Who needs that stuff?!? They also screw up ones head and balance with falls and fractures. If one stops taking them, the withdrawal symptoms sound worse than heroin. In addition to all this, some are addicting and it is very difficult to stop taking them.