Millions of Americans take antidepressant drugs — most are Prozac and related antidepressant medications in the class known as selective serotonin reuptake inhibitors (SSRIs). A gigantic money maker for the drug giants, the SSRIs bring in billions to Big Pharma a year. They are promoted and prescribed as safe treatments for depression, anxiety and even premenstrual tension — despite a long list of possible side effects ranging from sexual dysfunction and headaches to dizziness and suicide.