Fluoxetine (generic Prozac®) is an antidepressant of the selective serotonin reuptake inhibitor (SSRI) class.

Fluoxetine is approved for the treatment of major depression (including pediatric depression), obsessive-compulsive disorder (in both adult and pediatric populations), bulimia nervosa, anorexia nervosa, panic disorder and premenstrual dysphoric disorder.

Despite the availability of newer agents, it remains extremely popular. Over 22.2 million prescriptions for generic formulations of fluoxetine were filled in the United States in 2007, making it the third most prescribed antidepressant