Medical symbolDirectory of Drugs: Prescription symbol Fluoxetine - Prozac




FDA ALERT [07/2006] – Possible Life- Threatening Serotonin Syndrome When Used With Triptan Medicines

A life-threatening condition called serotonin syndrome can happen when medicines called selective serotonin reuptake inhibitors (SSRIs), such as Prozac, and medicines used to treat migraine headaches known as 5-hydroxytryptamine receptor agonists (triptans), are used together.  Signs and symptoms of serotonin syndrome include the following:

  • restlessness
  • hallucinations
  • loss of coordination
  • fast heart beat
  • increased body temperature
  • fast changes in blood pressure
  • overactive reflexes
  • diarrhea
  • coma
  • nausea
  • vomiting

Serotonin syndrome may be more likely to occur when starting or increasing the dose of an SSRI or a triptan.  This information comes from reports sent to FDA and knowledge of how these medicines work.  If you take migraine headache medicines, ask your healthcare professional if your medicine is a triptan.

Before you take Prozac and a triptan together, talk to your healthcare professional.  If you must take these medicines together, be aware of the possibility of serotonin syndrome, and get medical care right away if you think serotonin syndrome is happening to you.


FDA ALERT [07/2006] – Infant Persistent Pulmonary Hypertension
The results of a study that looked at the use of antidepressant medicines during pregnancy in  mothers of babies born with a serious condition called persistent pulmonary hypertension of the newborn (PPHN) were recently published in a medical journal.
Babies born with PPHN have abnormal blood flow through the heart and lungs and do not get enough oxygen to their bodies.  Babies with PPHN can be very sick and may die.

The study results showed that:

  • babies born to mothers who took selective serotonin reuptake inhibitors (SSRIs), the family of medicines Prozac belongs to,
  • 20 weeks or later in their pregnancies,
  • had a higher chance (were 6 times as likely) to have persistent pulmonary hypertension (PPHN),
  • than babies born to mothers who did not take antidepressants during pregnancy.

The FDA plans to further look at the role of SSRIs in babies with PPHN.

Talk to your doctor if you are taking Prozac and are pregnant or are planning to have a baby.  You and your doctor will need to talk about the best way to treat your depression during pregnancy.

What is Prozac?

Prozac is in a class of medicines called selective serotonin reuptake inhibitors (SSRIs). Prozac is used to treat Depression, Obsessive-Compulsive Disorder (OCD), Bulemia Nervosa, and Panic Disorder.

Who Should Not Take Prozac?

Never take Prozac if you are taking another drug used to treat depression, called a Monoamine Oxidase Inhibitor (MAOI), or if you have stopped taking an MAOI in the last 14 days. Taking Prozac close in time to an MAOI can result in serious, sometimes fatal, reactions, including:

  • High body temperature
  • Coma
  • Seizures (convulsions)

Do not take a MAOI within 5 weeks of stopping Prozac.  MAOI drugs include Nardil (phenelzine sulfate), Parnate (tranylcypromine sulfate), Marplan (isocarboxazid), and other brands.

Never take Prozac if you are taking Mellaril (thioridazine), used to treat schizophrenia. Also, do not take Mellaril within 5 weeks of stopping Prozac. Taking Prozac close in time to Mellaril can result in serious heart beat problems.

What Are The Risks?

The following are the major potential risks and side ffects of Prozac therapy.  However, this list is not complete.

  • Possible life-threatening serotonin syndrome when used with triptan medicines:  See FDA Alert [07/2006] above.

  • Infant persistent pulmonary hypertension:  See FDA Alert [07/2006] above.

  • Suicidal thoughts or actions: Persons taking Prozac may be more likely to think about killing themselves or actually try to do so, especially when Prozac is first started or the dose is changed.  People close to persons taking Prozac can help by paying attention to changes in user’s moods or actions.   Contact your healthcare professional right away if someone using Prozac talks about or shows signs of killing him or herself.  If you are taking Prozac yourself and you start thinking about killing yourself, tell your healthcare professional about this side effect right away.

  • Stopping Prozac: Do not stop taking Prozac suddenly because you could get side effects. Your healthcare professional will slowly decrease your dose.

  • Rash and possible allergic reactions: Prozac may cause serious skin, lung and allergic-type reactions. Contact your healthcare professional right away if you get a skin rash or hives, have problems breathing, or get swelling of your tongue, lips, or throat.

  • Bleeding problems: Prozac may cause bleeding problems, especially if taken with aspirin, NSAIDs (nonsteroidal anti-inflammatory drugs, such as ibuprofen and naproxen), or other drugs that affect bleeding.

  • Mania: You may become unusually hyperactive, excitable or elated.

  • Seizures: You may experience a seizure (convulsion), even if you are not taking Prozac close in time with an MAOI.

  • Weight loss: Prozac can cause weight loss. Children who take it for a long time should have their growth and body weight measured regularly.

  • Pregnancy: Tell your healthcare professional if you are or may be pregnant (see FDA Alert [07/2006] above).  In addition to the issue described in the alert,  babies delivered to mothers taking Prozac late in pregnancy have developed problems, such as difficulty breathing and feeding.

  • Sexual problems: You may have problems with impotence (erectile dysfunction), abnormal ejaculation, difficulty reaching orgasm, or decreased libido (sexual desire).

  • Other side effects include nausea, difficulty sleeping, anxiety, nervousness, and sleepiness.

  • Tell your healthcare professional about all your medical conditions, especially if you have liver or heart disease, or diabetes. Tell your healthcare professional if you are breast-feeding or plan to breast-feed your baby.

Are There Any Interactions With Drugs or Foods?

  • Do not take Prozac with Sarafem (Prozac hydrochloride), a drug used to treat PreMenstrual Dysphoric Disorder (PMDD), because they are very similar and you could get an overdose.

  • Prozac may interact with medicines other than the ones already mentioned in this information sheet, causing serious side effects. Tell your healthcare professional about all medicines, vitamins, and herbal supplements you take, especially:

    • Those that affect bleeding
    • Those used to treat diabetes, seizures, anxiety, mental illness, or depression

  • If you plan to drink alcohol, talk to your healthcare professional.

How Do I Take Prozac?

  • Prozac is taken by mouth, with or without food, exactly as prescribed by your healthcare professional.

  • Take the weekly version of Prozac only once a week. Do not start until 7 days after you’ve taken the last dose of the daily Prozac.

Date created: May 2005; Updated: July 19, 2006


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