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trademark for a preparation of danazol, an anterior pituitary suppressant used for treatment of endometriosis, fibrocystic disease of the breast, hereditary angioedema, and gynecomastia.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


(da-na-zole) ,


(trade name),


(trade name)


Therapeutic: hormones
Pharmacologic: androgens
Pregnancy Category: X


Treatment of moderate endometriosis that is unresponsive to conventional therapy.Palliative therapy of fibrocystic breast disease.Prophylaxis of hereditary angioedema.


Inhibits pituitary output of gonadotropins, resulting in suppression of ovarian function. Has weak androgenic-anabolic activity.

Therapeutic effects

Atrophy of ectopic endometrial tissue in endometriosis.
Decreased pain and nodularity in fibrocystic breast disease.
Correction of biochemical abnormalities in hereditary angioedema.


Absorption: Absorbed from the GI tract.
Distribution: Unknown.
Metabolism and Excretion: Metabolized by the liver.
Half-life: 4.5 hr.

Time/action profile (disease response)

PO (endometriosis)unknown6–8 wk60–90 days
PO (fibrocystic disease)1 mo2–6 mo1 yr
PO (angioedema)unknown1–3 mounknown


Contraindicated in: Hypersensitivity; Male patients with breast or prostate cancer; Hypercalcemia; Severe hepatic, renal, or cardiac disease; Obstetric / Lactation: Pregnancy or lactation.
Use Cautiously in: Previous history of liver disease; History of porphyria; Coronary artery disease; Prepubertal boys.

Adverse Reactions/Side Effects

Central nervous system

  • emotional lability (most frequent)

Ear, Eye, Nose, Throat

  • deepening of voice (most frequent)


  • edema (most frequent)


  • hepatitis (cholestatic jaundice)


  • amenorrhea
  • clitoral enlargement
  • testicular atrophy


  • acne (most frequent)
  • hirsutism (most frequent)
  • oiliness (most frequent)


  • amenorrhea (most frequent)
  • anovulation (most frequent)
  • ↓ breast size (women) (most frequent)
  • ↓ libido


  • weight gain (most frequent)


Drug-Drug interaction

May potentiate warfarin, oral hypoglycemic agents, insulins, or corticosteroids.May ↑ cyclosporine or carbamazepine levels and risk of toxicity.May ↑ the requirement for insulin in patients with diabetes.↑ risk of myopathy or rhabdomyolysis with HMG Co-A reductase inhibitors


Oral (Adults and Adolescents) Endometriosis—400 mg twice daily (for milder cases may initiate therapy with 100–200 mg twice daily). Fibrocystic breast disease—50–200 mg twice daily.Hereditary angioedema—200 mg 2–3 times daily. Attempt to ↓ dosage by 50% or less q 1–3 mo. If acute attack occurs, ↑ dose by up to 200 mg/day.


Capsules: 50 mg, 100 mg, 200 mg

Nursing implications

Nursing assessment

  • Endometriosis: Assess endometrial pain before and periodically throughout therapy.
  • Fibrocystic Breast Disease: Assess breast pain, tenderness, and nodules before and monthly throughout therapy. To rule out carcinoma, mammography or cyst biopsy is recommended before and during treatment if nodules persist or enlarge.
  • Hereditary Angioedema: Monitor for edematous attacks throughout therapy, especially during dosage adjustments.
  • Lab Test Considerations: Monitor liver function tests periodically throughout therapy.
    • Semen volume and viscosity, sperm count, and motility determinations are recommended every 3–4 mo during treatment for hereditary angioedema, especially in adolescents.
    • May alter results of glucose tolerance or thyroid function tests. May also cause ↑ serum glucose and low-density lipoprotein concentrations and ↓ high-density lipoprotein concentrations.

Potential Nursing Diagnoses

Sexual dysfunction (Side Effects)
Disturbed body image (Side Effects)
Deficient knowledge, related to medication regimen (Patient/Family Teaching)


  • In patients with endometriosis or fibrocystic breast disease, therapy should be started during menstruation or preceded by a pregnancy test. Advise patient to notify health care professional immediately if pregnancy is suspected.
  • Oral: Medication may be administered with meals to minimize GI irritation.

Patient/Family Teaching

  • Instruct patient to take medication exactly as directed. Take missed doses as soon as remembered, if not almost time for next dose; do not double doses.
    • Advise patient to notify health care professional if masculinizing effects occur (abnormal growth of facial hair or other body hair, deepening of the voice).
    • Advise patient to use sunscreen and protective clothing to prevent photosensitivity reactions.
    • Advise patient to use a nonhormonal form of contraception during therapy. Inform patient that amenorrhea is expected with higher doses. Instruct patient to notify health care professional if regular menstruation does not occur within 60–90 days after discontinuation of therapy or if pregnancy is suspected.
    • Emphasize the importance of routine visits to health care professional to check progress during therapy.
  • Fibrocystic Breast Disease: Teach patient the correct technique for monthly breast self-exam. Instruct patient to report increase in size of nodules to health care professional promptly.

Evaluation/Desired Outcomes

  • Decrease in symptoms of endometriosis. Therapy for endometriosis usually requires 3–6 mo and may extend to 9 mo to decrease symptoms.
  • Relief of pain and tenderness in fibrocystic breast disease, which is usually relieved by the first month and eliminated in 2–3 mo. Elimination of nodularity usually requires 4–6 mo.
  • Resolution of signs and symptoms of hereditary angioedema. Initial response in hereditary angioedema may require 1–3 mo of therapy; efforts should be made to decrease dose at 1–3-mo intervals.
Drug Guide, © 2015 Farlex and Partners


A brand name for DANAZOLE.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
References in periodicals archive ?
[182] In Zuchowicz, the plaintiffs wife died from a fatal lung condition allegedly caused by the drug Danocrine. [183] Mrs.
His examination included taking a detailed history of the progression of her disease, her medical history, and the timing of her Danocrine overdose and the onset of her symptoms.
The synthetic progestin and androgen danazol (marketed in the United States as Danocrine) can be used as an emergency contraceptive.
The drug danazol (Danocrine), which is chemically similar to the male sex hormone testosterone, may also be prescribed to stem heavy menstrual bleeding caused by a fibroid.
Those drugs (like Danocrine or Synarel) cause side effects that mimic menopause, including hot flashes, headache, decreased breast size, weight gain, vaginal atrophy, and bone loss.
Endometriosis frequently recurs, but the addition of postsurgical medical therapy, such as birth control pills, GnRH agonists, like leuprolide (Lupron) or danazol (Danocrine), for six months may increase the pain-free interval.
Danazol (Danocrine, Sanofi-Synthelabo Inc.; plus generics), valproate sodium (Depacon, Abbott; plus generics), and valproic acid (Depakene, Abbott; plus generics) are other common drug-related causes.
Efficacy results for another PCHC involving danocrine (marketed in the United States as Danazol), a synthetic steroid used in the treatment of endometriosis, are mixed.
Danazol (Danocrine) is a medication that works similarly to GnRH agonists to prevent ovulation.
A newer postcoital therapy consists of three 200-mg tablets of danocrine (marketed in the United States as Danazol) taken within 72 hours of unprotected intercourse and repeated 12 hours later.
Results concerning the efficacy of danocrine are mixed.
This reproductive hormone is a synthetic form of a male hormone (androgen) and is available as Danocrine. It is also used to treat endometriosis and works by directly suppressing endometrial tissue and suppressing ovarian hormone production.