How it works
Fluoxetine is in a class of medication called selective serotonin reuptake inhibitors (SSRIs). It is used to treat depression, anxiety, obsessive-compulsive disorder, some eating disorders, panic attacks, and to relieve the symptoms of premenstrual dysphoric disorder. Fluoxetine works by increasing the amount of serotonin, a natural substance in the brain that helps maintain mental balance.
Fluoxetine is a non-controlled medication, which means that it is not classified as having euphoric or addictive properties. There are no cravings, no hazardous behaviors, and no examples of prolonged addictive behavior associated with it.
Fluoxetine may make you drowsy. Do not drive a car or operate machinery until you know how this medication affects you. Remember that alcohol can add to the drowsiness caused by this medication.
How it should be used
It may take 4 to 5 weeks or longer before you feel the full benefit of fluoxetine. Continue to take fluoxetine even if you feel well.
Do not stop taking fluoxetine without talking to your doctor. If you suddenly stop taking fluoxetine, you may experience withdrawal symptoms such as mood changes, irritability, agitation, dizziness, numbness or tingling in the hands or feet, anxiety, sweating, confusion, headache, tiredness, and difficulty falling asleep or staying asleep. Your doctor will probably decrease your dose gradually.
What to do if you forget a dose
Take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.
fluoxetine may cause side effects. However, they tend to go away after an adaptation period. Tell your doctor if any of these symptoms are severe or do not go away:
- difficulty falling asleep or staying asleep
- dry mouth
- uncontrollable shaking of a part of the body
- loss of appetite
- weight loss
- changes in sex drive or ability
- excessive sweating
- headache, confusion, weakness, difficulty concentrating, or memory problems
Some side effects can be serious. If you experience either of the following symptoms or those listed in the IMPORTANT WARNING or SPECIAL PRECAUTIONS sections, call your doctor immediately:
- hives or blisters
- joint pain
- swelling of the face, throat, tongue, lips, eyes, hands, feet, ankles, or lower legs
- difficulty breathing or swallowing
- agitation, fever, sweating, confusion, fast or irregular heartbeat, shivering, severe muscle stiffness or twitching, hallucinations, loss of coordination, nausea, vomiting, or diarrhea
- fast, slow, or irregular heartbeat
- shortness of breath
- dizziness or fainting
- abnormal bleeding or bruising
Fluoxetine may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.
In case of emergency or overdose
In case of overdose, call the poison control helpline at 1-800-222-1222. Information is also available online at https://www.poisonhelp.org/help. If the victim has collapsed, had a seizure, has trouble breathing, or can’t be awakened, immediately call emergency services at 911.
The information about this medication is not intended to replace medical counseling. Please consult your pharmacist and/or health provider for more comprehensive information. You can also find the Medication Guide containing the manufacturer’s patient information approved by the FDA here.
Last Revised on 03/15/2020