Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor immediately if any of these unlikely but serious side effects occur: swelling of hands/feet, mental/mood changes (e.g., nervousness, depression).

Women may experience signs of masculinization (male characteristics) from danazol. To prevent these changes from becoming permanent, stop taking this medication and tell your doctor immediately if any of the following occur: hoarseness, deepening voice, sore throat, facial hair growth, new or worsening acne, enlarged clitoris.

Women often stop having regular menstrual periods while taking this medication. Menstrual periods usually return within 90 days of stopping the drug.

A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching, swelling, severe dizziness, trouble breathing.

If you notice other effects not listed above, contact your doctor or pharmacist.