Side Effects of This Medicine

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor as soon as possible if any of the following side effects occur:

More common

Decreased sexual drive or ability; inability to sit still; restlessness; skin rash, hives, or itching

Less common

Chills or fever; joint or muscle pain

Rare

Breast enlargement or pain; convulsions (seizures); fast or irregular heartbeat; purple or red spots on skin; symptoms of hypoglycemia (low blood sugar), including anxiety or nervousness, chills, cold sweats, confusion, cool pale skin, difficulty in concentration, drowsiness, excessive hunger, fast heartbeat, headache, shakiness or unsteady walk, or unusual tiredness or weakness; symptoms of hyponatremia (low blood sodium), including confusion, convulsions (seizures), drowsiness, dryness of mouth, increased thirst, lack of energy; symptoms of serotonin syndrome, including diarrhea, fever, increased sweating, mood or behavior changes, overactive reflexes, racing heartbeat, restlessness, shivering or shaking; talking, feeling, and acting with excitement and activity you cannot control; trouble in breathing; unusual or incomplete body or facial movements; unusual secretion of milk, in females

Symptoms of overdose—May be more severe than side effects that may occur from regular doses, or several symptoms may occur together

Agitation and restlessness; convulsions (seizures); drowsiness; fast heartbeat; nausea and vomiting; talking, feeling, and acting with excitement and activity you cannot control; trembling or shaking

Other side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. However, check with your doctor if any of the following side effects continue or are bothersome:

More common

Anxiety or nervousness; decreased appetite; diarrhea; drowsiness; headache; increased sweating; nausea; tiredness or weakness; trembling or shaking; trouble in sleeping

Less common or rare

Abnormal dreams; change in sense of taste; changes in vision; chest pain; constipation; dizziness or light-headedness; dryness of mouth; feeling of warmth or heat; flushing or redness of skin, especially on face and neck; frequent urination; hair loss; increased appetite; increased sensitivity of skin to sunlight; menstrual pain; stomach cramps, gas, or pain; vomiting; weight loss; yawning

After you stop taking fluoxetine, your body may need time to adjust. The length of time this takes depends on the amount of medicine you were using and how long you used it. During this period of time, check with your doctor if you notice any of the following side effects:

Anxiety; dizziness; feeling that body or surroundings are turning; general feeling of discomfort or illness; headache; nausea; sweating; unusual tiredness or weakness

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.