Prozac (fluoxetine)

Antidepressant Medication

When Is It Prescribed?

Prozac (fluoxetine) is prescribed to treat:

Proxac (fluoxetine) is in a class of drugs called selective serontonin reuptake inhibitors (SSRIs). Fluoxetine affects chemicals in your brain that may become unbalanced and cause depression, eating disorders, or obsessive or compulsive symptoms.

This medication may also be prescribed for purposes other than what’s listed above.

When Will It Start to Work?

It may take 4 weeks or more for you to start feeling better. Do not stop taking fluoxetine or Prozac without first talking to your prescribing doctor or therapist.

Are There Any Drug Interactions?

Do not take fluoxetine if you have taken a monoamine oxidase inhibitor (MAOI) such as Marplan (isocarboxazid), Nardil (phenelzine), or Parnate (tranylcypromine) during the last 2 weeks. Serious, and sometimes fatal, reactions have occurred when these medications have been used together.

Always follow your doctor's or therapist's recommendations on how to take your medication and let them know if you are taking any other prescription medications, herbal remedies, vitamins, and/or over-the-counter medications.

Pregnancy and Breastfeeding Issues

If you are pregnant, or plan to become pregnant, discuss the potential risks of this medication with your doctor.

Fluoxetine passes into breast milk and may affect a nursing infant. Do not take this medication without first talking to your doctor or therapist if you are breastfeeding.

Other Important Information and Precautions:

Before taking fluoxetine, tell your doctor or therapist if you have:

  • liver disease

  • kidney disease

  • diabetes

  • suffer from seizures

  • suffer from mania

  • have suicidal thoughts

You may not be able to take Prozac (fluoxetine), or you may need a dosage adjustment or special monitoring during treatment, if you have any of the conditions listed above.

Avoid grapefruit (including grapefruit juice) when taking Prozac.

In addition to the information listed above, there may be other important issues or precautions related to this medication. For further information, you can ask your prescribing doctor or therapist.

Side-Effect Information

Only some people will experience side-effects -- and no one experiences side-effects in exactly the same way. If you should experience any side-effects, contact your doctor or therapist right away and continue taking your medication until otherwise advised.

The following list may not contain all of the side-effects associated with this medication:

Most Common Side-Effects decreased appetite, weight loss, nausea, altered taste, insomnia, headache
Infrequent Side-Effects blurred vision, anxiety, nervousness, drowsiness, dizziness, excessive sweating, anorexia, impaired erection
Rare Side-Effects/Risks hypomania, seizures, tremor

Side-effects and risks other than those listed above may also occur. Talk to your prescribing doctor or therapist about any potential or existing side-effects that you’re concerned about.

Every effort has been made to ensure that the information provided by is accurate and up-to-date, but no guarantee is made to that effect.’s medication information is a reference resource designed as a supplement to, and not a substitute for, the expertise, skill, knowledge, and judgment of healthcare practitioners in patient care. does not assume any responsibility for any aspect of healthcare administered with the aid of information provides.