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Fluoxetine

This form:

Pronounced

"flew-OX-eh-teen"

Common brand names:

Prozac

Uses

This medication is used to treat certain mental/mood disorders (such as depression, panic attacks, obsessive compulsive disorder). It is also used to treat a certain eating disorder (bulimia) and a severe form of premenstrual syndrome (premenstrual dysphoric disorder). 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.

Other Uses

This section contains uses of this drug that are not listed in the approved professional labeling for the drug but that may be prescribed by your health care professional. Use this drug for a condition that is listed in this section only if it has been so prescribed by your health care professional.

This drug may also be used for other eating disorders (anorexia nervosa, binge eating disorder-BED), post traumatic stress disorder (PTSD), certain nervous system/sleep disorders (cataplexy, narcolepsy), or hot flashes that occur with menopause.

How to Use This Medication

Read the Medication Guide provided by your pharmacist before you start using fluoxetine and each time you get a refill. If you have any questions, ask your doctor or pharmacist.

Take this medication by mouth as directed by your doctor, usually once daily in the morning. If you are taking this medication twice a day, your doctor may direct you to take it in the morning and at noon.

If you are taking fluoxetine for premenstrual problems, your doctor may direct you to take it every day of the month or just for the 2 weeks before your period through the first full day of your period. To help you remember, mark your calendar.

If you are using the liquid form of this medication, measure the dose carefully using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose.

The dosage is based on your medical condition and response to treatment. To reduce your risk of side effects, your doctor may direct you to start this medication at a low dose and gradually increase your dose. Follow your doctor's instructions carefully. Take this medication regularly to get the most benefit from it. To help you remember, take it at the same time each day.

Keep taking this medication even if you feel well. Do not stop taking this medication without first consulting your doctor. Some conditions may become worse when the drug is abruptly stopped. Your dose may need to be gradually decreased.

You should see some improvement in 1 to 2 weeks. It may take 4 to 5 weeks before you feel the full benefit.

Tell your doctor if your condition does not improve or if it worsens.

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Drug information is selected from data included with permission and copyrighted by First DataBank, Inc. This is a summary and does not contain all possible information about this product. For complete information about this product or your specific health needs, ask your healthcare professional. Always seek the advice of your healthcare professional if you have any questions about this product or your medical condition. This information is not intended as individual medical advice and does not substitute for the knowledge and judgment of your healthcare professional. This information does not contain any assurances that this product is safe, effective or appropriate for you.

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Information expires December 2025.