This medication must not be used during pregnancy. It may harm an unborn baby. In women of childbearing age, this medication should be started during their menstrual period. If not, then they should have a negative pregnancy test before starting this medication. It is important to prevent pregnancy while using this medication. Consult your doctor for more details and to discuss the use reliable forms of non-hormonal birth control (such as condoms, diaphragm with spermicide) while using this medication. If you become pregnant or think you may be pregnant, tell your doctor right away.
Danazol has rarely caused very serious (possibly fatal) blood clots (such as stroke), liver disease, and increased pressure on the brain (benign intracranial hypertension). Seek immediate medical attention if you have any symptoms of these side effects, including weakness on one side of the body, slurred speech, vision changes, severe stomach/abdominal pain, dark urine, persistent nausea/vomiting, yellowing eyes/skin, mental/mood changes (such as confusion), severe/persistent headache.Who should not take danazol?
This medication is used in women to treat pelvic pain and infertility due to a certain uterus disorder (endometriosis) and also to treat breast pain/tenderness/nodules due to a certain breast condition (fibrocystic breast disease). It is also used in both men and women to prevent swelling of the abdomen/arms/legs/face/airway due to a certain congenital disease (hereditary angioedema).
Danazol is an androgen similar to testosterone. For the treatment of endometriosis and fibrocystic breast disease, it works by decreasing the amount of hormones made by the ovaries. These hormones usually make the conditions worse. For the treatment of angioedema, danazol helps to increase the amount of a certain protein in your body's defense system (immune system).
Take this medication by mouth, usually twice daily or as directed by your doctor. You may take this medication with or without food, but it is important to choose one way and take this medication the same way with every dose.
The dosage is based on your medical condition and response to treatment.
Use this medication regularly to get the most benefit from it. To help you remember, take it at the same times each day.
Tell your doctor if your condition does not improve or if it worsens.
See also Warning section.
Weight gain, acne, flushing, sweating, voice changes (hoarseness, change in pitch), abnormal growth of body hair (in women), vaginal dryness/irritation, or decreased breast size may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
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 right away if any of these unlikely but serious side effects occur: swelling hands/ankles/feet, menstrual changes (such as spotting, missed periods), mental/mood changes (such as nervousness, mood swings).
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 (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Before taking danazol, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: heart/blood vessel disease (such as coronary artery disease, stroke), high blood pressure (hypertension), diabetes, high cholesterol levels, breast cancer, liver disease, kidney disease, seizures, migraine headaches, unusual vaginal bleeding, certain blood disorders (porphyria, polycythemia), prostate cancer.
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
This medication may affect the sperm. Consult your doctor for more details.
This medication must not be used during pregnancy. It may harm the unborn baby. If you become pregnant or think you may be pregnant, tell your doctor right away. (See also Warning section.)
It is unknown if this medication passes into breast milk. Because of the possible risk to the infant, breast-feeding while using this drug is not recommended. Consult your doctor before breast-feeding.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
Some products that may interact with this drug include: "blood thinners" (such as warfarin), carbamazepine, certain "statin" cholesterol medications (lovastatin, simvastatin).
This medication may interfere with certain laboratory tests (including blood levels of male hormones such as testosterone), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.
If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: yellowing eyes/skin, severe stomach/abdominal pain, dark urine.
Do not share this medication with others.
Laboratory and/or medical tests (such as liver function, cholesterol levels) should be performed periodically to monitor your progress or check for side effects. Consult your doctor for more details.
If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.
Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
Information last revised July 2016. Copyright(c) 2016 First Databank, Inc.
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