Danazol Side Effects
What should I watch for?
Check with your doctor or health care professional if you are a female patient and notice any changes in your voice, decrease in breast size, or if hair starts growing on your face.
This medicine should not be used in pregnancy. You should use a non-hormonal form of birth control while on this medicine. If you become pregnant or think you may be pregnant while you are taking this medicine, you should stop taking this medicine and contact your doctor or health care professional. This medicine may cause risk to a female fetus.
This medicine can affect your menstrual cycle and you may stop having menstrual periods. These will return to normal within 2 to 3 months after you stop taking this medicine.
Common and Rare Side Effects
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 immediately if any of the following side effects occur:
For both females and males
increased oiliness of the hair or skin
muscle cramps or spasms
rapid weight gain
swelling of the feet or lower legs
unusual tiredness or weakness
blood in the urine
burning, numbness, pain, or tingling in all fingers except the smallest finger
changes in vision
complete or partial numbness or weakness on one side of body
coughing up blood
difficulty with speaking
difficulty with swallowing
discharge from the nipple
hives or other skin rash
loss of appetite (continuing)
loss of muscle coordination
more frequent nosebleeds
purple- or red-colored, or other spots on the body or inside the mouth or nose
shortness of breath
tingling, numbness, or weakness in the legs, which may move upward to the arms, trunk, or face
unusual bruising or bleeding
unusual tiredness, weakness, or general feeling of illness
yellow eyes or skin
For females only
Decrease in the breast size
irregular menstrual periods
hoarseness or deepening of voice
unnatural hair growth
For males only
Changes in semen
decrease in the size of the testicles
Some 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. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
For both females and males
Flushing or redness of the skin
mood or mental changes
Increased sensitivity of the skin to sunlight
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.