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Danazol Side Effects

Medically reviewed by Last updated on Nov 17, 2023.

Applies to danazol: oral capsule.


Oral route (Capsule)

Use of danazol in pregnancy is contraindicated. A sensitive test capable of determining early pregnancy is recommended immediately prior to start of therapy. A nonhormonal method of contraception should be used during therapy. Androgenic effects on the female fetus exposed in utero have been reported. Thromboembolism, thrombotic and thrombophlebitic events have been reported. Experience with long-term therapy is limited. Physician should be alert to the possibility of potentially silent peliosis hepatis and benign hepatic adenoma with long-term use. Determine the lowest dose that will provide adequate protection. Attempt to decrease or withdraw therapy if initiated during exacerbation of hereditary angioneurotic edema due to trauma, stress, or other cause. Several cases of benign intracranial hypertension have been reported. Screen for papilledema and advise to discontinue immediately if symptoms are present.

Serious side effects of Danazol

Along with its needed effects, danazol 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 while taking danazol:

For both females and males

Less common


For females only

More common


For males only


Other side effects of Danazol

Some side effects of danazol 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

Less common


For females only

Less common

For Healthcare Professionals

Applies to danazol: compounding powder, oral capsule.


The most commonly reported side effects included acne, edema, and flushing.[Ref]


Very common (10% or more): Acne (up to 13%)

Common (1% to 10%): Facial edema, hair loss, hirsutism/mild hirsutism, maculopapular rash, papular rash, petechial rash, purpuric rash, seborrhea, sun sensitivity/sun sensitive rash, sweating, vesicular rash

Uncommon (0.1% to 1%): Pruritus, urticaria

Very rare (less than 0.01%): Erythema multiforme, inflammatory erythematous nodules, skin pigmentation/skin pigmentation change, Stevens-Johnson syndrome

Frequency not reported: Exfoliative dermatitis, rash[Ref]


Common (1% to 10%): Arthralgia, backache/back pain, extremity pain, fasciculation, joint lock-up, joint swelling, muscle cramps, muscle spasms, muscle tremors, neck pain, spasms/pains

Rare (0.01% to 0.1%): Benign intracranial hypertension, dizziness

Very rare (less than 0.01%): Carpal tunnel syndrome

Frequency not reported: Altered creatine phosphokinase, creatinine phosphokinase increased, joint pain, limb pain[Ref]


Common (1% to 10%): Amenorrhea/persistent amenorrhea/prolonged posttherapy amenorrhea, alteration in cycle timing, menstrual disturbances, pelvic pain, spotting, vaginal dryness/irritation

Uncommon (0.1% to 1%): Breast size changes

Rare (0.01% to 0.1%): Hypertrophy of the clitoris

Very rare (less than 0.01%): Abnormalities in semen volume/viscosity/sperm count/motility, hematuria, testicular atrophy

Frequency not reported: Bartholin's cyst, nipple discharge[Ref]


Common (1% to 10%): Anxiety, depression/depressed mood, emotional lability, irritability, libido changes, nervousness

Frequency not reported: Sleep disorders[Ref]


Common (1% to 10%): Constipation, gastroenteritis, indigestion, nausea, vomiting

Rare (0.01% to 0.1%): Pancreatitis

Very rare (less than 0.01%): Epigastric pain

Frequency not reported: Bleeding gums[Ref]


Common (1% to 10%): Hoarseness, pitch deepening/instability, sore throat, voice change

Uncommon (0.1% to 1%): Nasal congestion

Very rare (less than 0.01%): Interstitial pneumonitis, pleuritic pain[Ref]


Common (1% to 10%): Appetite changes, increased insulin requirements (in patients with diabetes), weight gain

Rare (0.01% to 0.1%): Fluid retention

Frequency not reported: Abnormal glucagon, abnormal glucose tolerance, altered glucose tolerance, altered glucagon, decreased apolipoproteins AI and AII, decreased high density lipoprotein cholesterol, increased total cholesterol/low density lipoprotein cholesterol, induction of amino levulinic acid synthetase[Ref]


Common (1% to 10%): Edema, flushing

Rare (0.01% to 0.1%): Arterial thrombosis, blood pressure elevation, hypertension/hypertension exacerbation, palpitation/palpitation exacerbation, tachycardia/tachycardia exacerbation, thrombotic events

Frequency not reported: Myocardial infarction[Ref]

Nervous system

Common (1% to 10%): Headache

Rare (0.01% to 0.1%): Faintness, vertigo, tremor

Very rare (less than 0.01%): Epilepsy aggravation, migraine/migraine provocation

Frequency not reported: Benign intracranial hypertension, cerebrovascular thrombosis, convulsions, dizziness, Guillain-Barre syndrome, paresthesia, sagittal sinus thrombosis[Ref]


Common (1% to 10%): Fever

Rare (0.01% to 0.1%): Fatigue, weakness

Frequency not reported: Altered plasma proteins, chills, fasciculation[Ref]


Uncommon (0.1% to 1%): Hepatic dysfunction

Rare (0.01% to 0.1%): Cholestatic jaundice, hepatic adenoma

Very rare (less than 0.01%): Malignant hepatic tumor, peliosis hepatitis

Frequency not reported: Benign hepatic adenomata, hepatic failure, hepatocellular focal nodular hyperplasia, hepatocellular injury, hepatocellular jaundice, increased AST, jaundice, serum transaminase level increases, reversible elevated serum enzymes[Ref]


Rare (0.01% to 0.1%): Increased platelet count, increased red cell count, leukopenia, polycythemia/reversible polycythemia, thrombocytopenia

Very rare (less than 0.01%): Eosinophilia/reversible eosinophilia, reversible erythrocytosis, splenic peliosis

Frequency not reported: Leukocytosis[Ref]


Rare (0.01% to 0.1%): Blurred vision, difficulty wearing contact lenses, focusing difficulty, refraction disorders requiring correction

Frequency not reported: Cataracts[Ref]


Frequency not reported: Altered sex hormone binding globulin, blunted cyclical surges of luteinizing hormone (LH), decreased protein bound iodine, decreased thyroid binding globulin and T4, increased T3 uptake, no disturbance of thyroid stimulating hormone/free thyroxine index[Ref]


Frequency not reported: Malignant liver tumors[Ref]


Frequency not reported: Hereditary angioedema[Ref]


1. Product Information. Danocrine (danazol). Sanofi Winthrop Pharmaceuticals. 2001;PROD.

2. Cerner Multum, Inc. UK Summary of Product Characteristics.

3. Cerner Multum, Inc. Australian Product Information.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.