Drug: Danazol

Danazol is a synthetic steroid derived from ethisterone. It is a white to pale yellow crystalline powder, practically insoluble or insoluble in water, and sparingly soluble in alcohol. Chemically, Danazol is 17α -Pregna-2,4-dien-20-yno [2,3-d ]-isoxazol-17-ol. The molecular formula is C22H27NO2. It has a molecular weight of 337.46 and the following structural formula: Danazol capsules for oral administration contain 200 mg Danazol. Inactive Ingredients: Corn Starch, Lactose, Magnesium Stearate, Talc, D&C Yellow #10, D&C Red #28, FD&C Red #40, Gelatin, Silicon Dioxide, Sodium Lauryl Sulfate, Titanium Dioxide.Last reviewed on RxList: 7/16/2008
This monograph has been modified to include the generic and brand name in many instances.

Source: http://www.rxlist.com

The following events have been reported in association with the use of Danazol: Androgen like effects include weight gain, acne and seborrhea. Mild hirsutism, edema, hair loss, voice change, which may take the form of hoarseness, sore throat or of instability or deepening of pitch, may occur and may persist after cessation of therapy. Hypertrophy of the clitoris is rare. Other possible endocrine effects include menstrual disturbances in the form of spotting, alteration of the timing of the cycle and amenorrhea. Although cyclical bleeding and ovulation usually return within 60-90 days after discontinuation of therapy with Danazol, persistent amenorrhea has occasionally been reported. Flushing, sweating, vaginal dryness and irritation and reduction in breast size, may reflect lowering of estrogen. Nervousness and emotional lability have been reported. In the male a modest reduction in spermatogenesis may be evident during treatment. Abnormalities in semen volume, viscosity, sperm count, and motility may occur in patients receiving long-term therapy. Hepatic dysfunction, as evidenced by reversible elevated serum enzymes and/or jaundice, has been reported in patients receiving a daily dosage of Danazol of 400 mg or more. It is recommended that patients receiving Danazol be monitored for hepatic dysfunction by laboratory tests and clinical observation. Serious hepatic toxicity including cholestatic jaundice, peliosis hepatis, and hepatic adenoma have been reported. (See WARNINGS and PRECAUTIONS.) Abnormalities in laboratory tests may occur during therapy with Danazol including CPK, glucose tolerance, glucagon, thyroid binding globulin, sex hormone binding globulin, other plasma proteins, lipids and lipoproteins. The following reactions have been reported, a causal relationship to the administration of Danazol has neither been confirmed nor refuted; allergic: urticaria, pruritus and rarely, nasal congestion; CNS effects: headache, nervousness and emotional lability, dizziness and fainting, depression, fatigue, sleep disorders, tremor, paresthesias, weakness, visual disturbances, and rarely, benign intracranial hypertension, anxiety, changes in appetite, chills, and rarely convulsions, Guillain-Barre syndrome; gastrointestinal: gastroenteritis, nausea, vomiting, constipation, and rarely, pancreatitis; musculoskeletal: muscle cramps or spasms, or pains, joint pain, joint lockup, joint swelling, pain in back, neck, or extremities, and rarely, carpal tunnel syndrome which may be secondary to fluid retention; genitourinary: hematuria, prolonged posttherapy amenorrhea; hematologic: an increase in red cell and platelet count. Reversible erythrocytosis, leukocytosis or polycythemia may be provoked. Eosinophilia, leukopenia and thrombocytopenia have also been noted. Skin: rashes (maculopapular, vesicular, papular, purpuric, petechial), and rarely, sun sensitivity, Stevens-Johnson syndrome; other: increased insulin requirements in diabetic patients, change in libido, elevation in blood pressure, and rarely, cataracts, bleeding gums, fever, pelvic pain, nipple discharge. Malignant liver tumors have been reported in rare instances, after long-term use. Read the Danazol (danazol) Side Effects Center for a complete guide to possible side effectsLearn More »

Source: http://www.rxlist.com

Endometriosis In moderate to severe disease, or in patients infertile due to endometriosis, a starting dose of 800 mg given in two divided doses is recommended. Amenorrhea and rapid response to painful symptoms is best achieved at this dosage level. Gradual downward titration to a dose sufficient to maintain amenorrhea may be considered depending upon patient response. For mild cases, an initial daily dose of 200 mg to 400 mg given in two divided doses is recommended and may be adjusted depending on patient response. Therapy should begin during menstruation. Otherwise, appropriate tests should be performed to ensure that the patient is not pregnant while on therapy with Danazol. (See CONTRAINDICATIONS and WARNINGS.) It is essential that therapy continue uninterrupted for 3 to 6 months but may be extended to 9 months if necessary. After termination of therapy, if symptoms recur, treatment can be reinstituted. Fibrocystic Breast Disease The total daily dosage of Danazol for fibrocystic breast disease ranges from 100 mg to 400 mg given in two divided doses depending upon patient response. Therapy should begin during menstruation. Otherwise, appropriate tests should be performed to ensure that the patient is not pregnant while on therapy with Danazol. A nonhormonal method of contraception is recommended when Danazol is administered at this dose, since ovulation may not be suppressed. In most instances, breast pain and tenderness are significantly relieved by the first month and eliminated in 2 to 3 months. Usually elimination of nodularity requires 4 to 6 months of uninterrupted therapy. Regular menstrual patterns, irregular menstrual patterns, and amenorrhea each occur in approximately one-third of patients treated with 100 mg of Danazol. Irregular menstrual patterns and amenorrhea are observed more frequently with higher doses. Clinical studies have demonstrated that 50% of patients may show evidence of recurrence of symptoms within one year. In this event, treatment may be reinstated. Hereditary Angioedema The dosage requirements for continuous treatment of hereditary angioedema with Danazol should be individualized on the basis of the clinical response of the patient. It is recommended that the patient be started on 200 mg, two or three times a day. After a favorable initial response is obtained in terms of prevention of episodes of edematous attacks, the proper continuing dosage should be determined by decreasing the dosage by 50% or less at intervals of one to three months or longer if frequency of attacks prior to treatment dictates. If an attack occurs, the daily dosage may be increased by up to 200 mg. During the dose adjusting phase, close monitoring of the patient's response is indicated, particularly if the patient has a history of airway involvement.

Source: http://www.rxlist.com

Prolongation of prothrombin time occurs in patients stabilized on warfarin. Therapy with Danazol may cause an increase in carbamazepine levels in patients taking both drugs.Laboratory Tests: Danazol treatment may interfere with laboratory determinations of testosterone, androstenedione and dehydroepiandrosterone. Last reviewed on RxList: 7/16/2008
This monograph has been modified to include the generic and brand name in many instances.

Source: http://www.rxlist.com

Endometriosis Danazol is indicated for the treatment of endometriosis amenable to hormonal management. Fibrocystic Breast Disease Most cases of symptomatic fibrocystic breast disease may be treated by simple measures (e.g., padded brassieres and analgesics). In infrequent patients, symptoms of pain and tenderness may be severe enough to warrant treatment by suppression of ovarian function. Danazol is usually effective in decreasing nodularity, pain, and tenderness. It should be stressed to the patient that this treatment is not innocuous in that it involves considerable alterations of hormone levels and that recurrence of symptoms is very common after cessation of therapy. Hereditary Angioedema Danazol is indicated for the prevention of attacks of angioedema of all types (cutaneous, abdominal, laryngeal) in males and females.

Source: http://www.rxlist.com

Danazol should not be administered to patients with:
  1. Undiagnosed abnormal genital bleeding.
  2. Markedly impaired hepatic, renal, or cardiac function.
  3. Pregnancy. (See WARNINGS.)
  4. Breast feeding.
  5. Porphyria-Danazol can induce ALA synthetase activity and hence porphyrin metabolism.
Last reviewed on RxList: 7/16/2008
This monograph has been modified to include the generic and brand name in many instances.

Source: http://www.rxlist.com

No information provided.

Source: http://www.rxlist.com

Capsules of 200 mg (orange), bottles of 100 (NDC 0955-0306-20). Store at controlled room temperature, 15° C to 30° C (59° F to 86° F). Caution: Federal law prohibits dispensing without prescription. Manufactured for Sanofi-Synthelabo Inc. New York, NY 10016, by Nycomed Puerto Rico Inc. Barceloneta, Puerto Rico 00617. Issued August 1996. FDA revision date: 3/28/2001 Last reviewed on RxList: 7/16/2008
This monograph has been modified to include the generic and brand name in many instances.

Source: http://www.rxlist.com

Because Danazol may cause some degree of fluid retention, conditions that might be influenced by this factor, such as epilepsy, migraine, or cardiac or renal dysfunction, require careful observation. Since hepatic dysfunction manifested by modest increases in serum transaminase levels has been reported in patients treated with Danazol, periodic liver function tests should be performed (see WARNINGS and ADVERSE REACTIONS). Administration of Danazol has been reported to cause exacerbation of the manifestations of acute intermittent porphyria. (See CONTRAINDICATIONS.) Carcinogenesis, Mutagenesis, Impairment of Fertility No valid studies have been performed to assess the carcinogenicity of Danazol. Pregnancy, Teratogenic Effects (See CONTRAINDICATIONS.) Pregnancy Category X. Danazol administered orally to pregnant rats from the 6th through the 15th day of gestation at doses up to 250 mg/kg/day (7-15 times the human dose) did not result in drug-induced embryotoxicity or teratogenicity, nor difference in litter size, viability or weight of offspring compared to controls. In rabbits, the administration of Danazol on days 6-18 of gestation at doses of 60 mg/kg/day and above (2-4 times the human dose) resulted in inhibition of fetal development. Nursing Mothers (See CONTRAINDICATIONS.) Pediatric Use Safety and effectiveness in children have not been established. Last reviewed on RxList: 7/16/2008
This monograph has been modified to include the generic and brand name in many instances.

Source: http://www.rxlist.com

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