Fluoxetine is an antidepressant and belongs to a group of medicines known as selective serotonin reuptake inhibitors (SSRIs). This medicine works by increasing the activity of a chemical called serotonin in the brain. This medicine is available only with your doctor's prescription. Find patient medical information for Fluoxetine (Prozac, Sarafem, others) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Detailed Fluoxetine dosage information for adults and children. Includes dosages for Depression, Panic Disorder, Obsessive Compulsive Disorder and more; plus renal, liver and dialysis adjustments. Increase fluoxetine to 60–80 mg daily and maintain this dose for a full 6–8 weeks before declaring treatment failure, as higher doses may be required to achieve therapeutic response in treatment-resistant depression. 1, 2 Fluoxetine (Prozac) is a prescription antidepressant used to treat depression, OCD, bulimia, panic disorder, and PMDD. Learn about uses, dosage, side effects, and warnings. 40mg of fluoxetine sits in the middle of its dosing range. Here’s what that means for effects, side effects, and your treatment. Fluoxetine is in the class of medications called selective serotonin reuptake inhibitors (SSRIs) that are prescribed for humans to treat a wide range of anxiety disorders (Major Depressive Disorder, Obsessive Compulsive Disorder, Bulimia Nervosa, and Panic Disorder). Everything you need to know about Fluoxetine and the correct dosages for different conditions. Fluoxetine is a prescription medicine used to treat depression. It is important to talk with your healthcare provider about the risks of treating depression and also the risks of not treating it. Fluoxetine belongs to a class of drugs known as selective serotonin reuptake inhibitors (SSRIs). It works by helping to restore the balance of a certain natural substance (serotonin) in the brain.