Danazol
Also known as: Danocrine
* **Patience is key**: It may take **2 to 3 months** to see a positive response with this drug. Do not stop the medication abruptly unless instructed by your veterinarian. * **Monitor for liver issues**: Watch for signs of liver toxicity such as yellowing of the eyes, skin, or gums (jaundice), loss of appetite, or vomiting. * **Watch for bleeding**: Since this is often used for blood disorders, monitor for dark, tarry stools, unusual bruising, or bleeding gums. * **Handling precautions**: Pregnant women should avoid handling this medication due to the risk of birth defects.
Dosage must be set by your veterinarian for your specific pet. Never give human medication or another pet’s prescription without veterinary guidance.
What it is used for
- Adjunctive treatment of immune-mediated hemolytic anemia
- Adjunctive treatment of immune-mediated hemolytic anemia (non-regenerative forms)
- Adjunctive treatment of immune-mediated hemolytic anemia or thrombocytopenia
- Adjunctive treatment of immune-mediated hemolytic anemia or thrombocytopenia
How it is given
Possible side effects
- Hepatotoxicity (rare but significant in dogs)
- Virilization in females
- Weight gain
- Lethargy
- Edema
- Testicular atrophy
- Hirsutism
- Alopecia
- Vaginitis (reported in humans)
Cautions & contraindications
- Pregnancy (Teratogenic - FDA Category X)
- Nursing/breastfeeding
- Severe cardiac function impairment
- Severe renal function impairment
- Severe hepatic function impairment
- Undiagnosed abnormal vaginal bleeding
- > **Warning**: Danazol is highly teratogenic (FDA Category X) and must not be handled by pregnant women or used in pregnant animals. * Use with extreme caution in patients with pre-existing **hepatic, renal, or cardiac dysfunction**. * **Laboratory Alterations**: May alter thyroid panel results (decreased total T4, increased T3 uptake) without causing true hypothyroidism (free T4 and TSH remain normal). * ALT (SGPT) and AST (SGOT) may increase early in therapy but typically decrease towards baseline later in therapy or after discontinuation.
Drug interactions
- Cyclosporine: May significantly increase cyclosporine levels
- Insulin: By affecting carbohydrate metabolism, danazol may affect insulin requirements (doses may need to be increased) in diabetic patients
- Warfarin: Concomitant use may enhance the anticoagulant effect as danazol may decrease the synthesis of procoagulant factors in the liver
Frequently asked questions
What is Danazol used for in pets?
* **Patience is key**: It may take **2 to 3 months** to see a positive response with this drug. Do not stop the medication abruptly unless instructed by your veterinarian. * **Monitor for liver issues**: Watch for signs of liver toxicity such as yellowing of the eyes, skin, or gums (jaundice), loss of appetite, or vomiting. * **Watch for bleeding**: Since this is often used for blood disorders, monitor for dark, tarry stools, unusual bruising, or bleeding gums. * **Handling precautions**: Pregnant women should avoid handling this medication due to the risk of birth defects.
Is Danazol safe for my pet?
Dosage must be set by your veterinarian for your specific pet. Never give human medication or another pet’s prescription without veterinary guidance.
This article is for general education and is not a substitute for professional veterinary advice. If your pet is unwell, please consult a veterinarian.
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