Prozac (fluoxetine) is an antidepressant that’s regularly used to treat depression, OCD, and a variety of anxiety disorders. If you’ve been prescribed Prozac, you’re probably wondering how long it will take to start working, and when exactly you can expect to feel better. In 2011 over 43 million prescriptions for antidepressants were handed out in the UK and about 14 percent (or nearly 6 million prescriptions) of these were for a drug called fluoxetine, better known as Prozac. Fluoxetine (Prozac) is a selective serotonin reuptake inhibitor (SSRI). It's used to treat several mental health conditions, including depression and panic disorder. Prozac and Zoloft are similar selective serotonin reuptake inhibitors (SSRIs) prescribed for anxiety and depression. Prozac is FDA-approved for depression or bulimia, while Zoloft is FDA-approved for treating PTSD and social anxiety. Fluoxetine is used to treat depression, obsessive-compulsive disorder (OCD), bulimia nervosa, premenstrual dysphoric disorder (PMDD), and panic disorder. Prozac is a prescription medicine used to treat symptoms of major depressive disorder, obsessive-compulsive disorder, panic disorder, premenstrual dysphoric disorder (PMDD), and bulimia nervosa. Learn about side effects, dosages, drug interaction, warnings, and more. Learn about cost, uses, and more of Prozac (fluoxetine), which is a prescription capsule that treats some mental health conditions. Prozac is a medication used to treat depression. Learn about the pros and cons of Prozac, including its uses, side effects, and how to take and store it properly. Prozac (fluoxetine) is an SSRI antidepressant used to treat depression, OCD, panic disorder, bulimia, and PMDD by boosting serotonin levels in the brain. Find patient medical information for Fluoxetine (Prozac, Sarafem, others) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings.