Danazol (Danacrine)


  • Hormonal


  • Synthetic androgen


  • Endometriosis

  • Fibrocystic breast disease

  • Hereditary angioedema


  • Pregnancy and lactation

  • Undiagnosed vaginal bleeding

  • Markedly impaired hepatic, renal or cardiac function


  • Pregnancy category X

  • Rule out breast cancer prior to initiating treatment.

  • Begin endometriosis and fibrocystic breast disease therapy after ruling out pregnancy and during menstrual cycle.

  • May cause irreversible androgenic effects (hirsutism, decreased breast size, deepening of voice, clitoral hypertrophy)

Adverse Reactions (Side Effects):

  • Androgenic: acne, oily kin/hair, weight gain, mild hirsutism, decreased breast size, deepening of voice, clitoral hypertrophy, testicular hypotrophy

  • Hypoestrogenic: flushing, sweating, vaginitis, nervousness, emotional disorders

  • Hepatic dysfunction

  • CNS: dizziness, headache, sleep disorders, fatigue

  • Muscle cramps, joint pain and swelling


  • Administered orally

  • Mild Endometriosis: 

    • 200-400mg/day in two divided doses

  • Endometriosis: 

    • 800mg/day in two divided doses

  • Fibrocystic breast disease: 

    • 100-400mg/day in two divided doses

  • Hereditary angioedema: 

    • 200mg 2-3 times a day, decrease dose to individualized therapy

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