What is Prozac (fluoxetine) used for?

Prozac is a prescription medication used to treat several mental health conditions, including depression, panic disorder, obsessive-compulsive disorder (OCD), and bulimia nervosa (a type of eating disorder). The active ingredient in Prozac is fluoxetine. Fluoxetine is also available under the brand name Sarafem and is used to treat premenstrual dysphoric disorder. This medication is also used in people with depression who do not respond to other medications and to treat episodes of bipolar I disorder (manic-depressive disorder). 

How does Prozac (fluoxetine) work?

Prozac boosts mood and helps to maintain mental balance by increasing the amount of serotonin in the brain. Serotonin is a natural substance that plays an important role in mood regulation. Prozac is a selective serotonin reuptake inhibitor (SSRI), meaning it prevents the reuptake or absorption of serotonin by brain cells. In this way, it makes more serotonin available. 

What are Prozac (fluoxetine) doses?

Prozac is available as 10 mg and 20 mg tablets; 10 mg, 20 mg, and 40 mg capsules; and 20 mg/5 mL oral solution. The dose of Prozac depends on the condition being treated. The usual dose is between 10 mg and 60 mg once a day by mouth. Delayed-release capsules are typically taken once a week. Your doctor may start you on a low dose of Prozac and gradually increase the dose.