Since the antidepressants affect the concentration of serotonin, one of the safety warnings associated with antidepressants is for Serotonin Syndrome.  Serotonin Syndrome is a potentially life-threatening side effect of all the listed antidepressants that attempt to increase the amount of serotonin in the brain.  Some of the symptoms are:

•    Diarrhea
•    Restlessness Restlessness
•    Hallucinations
•    Fast heart beat
•    Vomiting
•    Increased body temperature
•    Fast changes in blood pressure
•    Overactive reflexes
•    Coma
•    Loss of coordination
•    Nausea