It is very important that your doctor check your progress at regular visits to make sure that this medicine does not cause unwanted effects. Blood tests may be needed to check for unwanted effects.
Using this medicine while you are pregnant can harm your unborn baby. If you are a woman who can bear children, your doctor may give you a pregnancy test before you start using this medicine to make sure you are not pregnant. Your birth control pills may not work as well while you are using this medicine. You must use an effective form of birth control (e.g., a condom, a diaphragm, spermicide) to keep from getting pregnant. If you think you have become pregnant while using the medicine, tell your doctor right away.
Using this medicine may cause irregular monthly periods or absence of menstrual period. If your regular monthly period does not begin within 60 to 90 days after you stop taking this medicine, check with your doctor right away.
Check with your doctor right away if you are a female and have a larger clitoris (sexual organ), deepening of your voice, or unusual hair growth after taking danazol. Your doctor may advise you to stop taking the medicine so these side effects do not get worse.
Stop using this medicine and check with your doctor if you have the following symptoms while taking this medicine: blurred vision; change in the ability to see colors, especially blue or yellow; headache; nausea; or vomiting.
For patients with diabetes:
- This medicine may affect blood sugar levels. If you notice a change in the results of your blood or urine sugar tests, check with your doctor.
Before you have any medical tests, tell the medical doctor in charge that you are taking this medicine. The results of some tests may be affected by this medicine.
Danazol may rarely cause your skin to be more sensitive to sunlight than it is normally. Exposure to sunlight, even for brief periods of time, may cause a skin rash, itching, redness, or other discoloration of the skin, or a severe sunburn. Check with your doctor if this occurs.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or supplements.