Major Uses

Stanozolol is related to testosterone and belongs to the class of drugs known as anabolic steroids. This class of medication promotes the buildup of body tissues and increases red blood cell production in the body. It is primarily used to improve appetite, strength, and vitality in ailing or aging animals. It may also be used to treat certain types of anemia or for other purposes.

Stanozolol is a controlled substance due to its potential for abuse. It can only be prescribed by veterinarians who have a valid and approved DEA license.

Common Precautions

Stanozolol may cause a variety of side effects, especially in cats. These side effects range in severity from mild to severe. Prolonged use of stanozolol may cause behavioral changes and liver damage. The drug may alter laboratory results for liver and thyroid function tests.

Stanozolol is not for use in pregnant animals due to a risk of masculinization of the undeveloped fetus. It should not be used in male animals intended for breeding or in animals with a history of prostate disease or mammary cancer. The drug should be used cautiously in animals suffering from pituitary gland disease, water retention, diabetes insipidus, heart disease, kidney disease, or liver disease. In cats, the drug may cause severe liver disease.

Stanozolol is known to interact with certain other drugs and supplements. Some of these drugs include warfarin, insulin, and other steroid medications. Using stanozolol along with corticosteroids may increase risk of swelling.

Stanozolol should not be used in animals with a known allergy or hypersensitivity to the drug. Overdose of stanozolol may cause jaundice, liver damage, increased water retention, and swelling. Any known or suspected overdose should be reported to a veterinarian right away.


Stanozolol should be stored in its original packaging, out of the reach of children and animals, and at room temperature. It should be kept away from light.


Stanozolol is available as an injectable in a concentration of 50 mg/ml in 10 ml and 30 ml vials. It is also available as 2 mg tablets. The typical dose for cats and small dogs is 1 to 2 mg/animal twice daily, or 25 mg of the injectable administered IM once weekly. Stanozolol may also be administered to larger dogs at a dose of 2 to 4 mg/animal twice daily, or 50 mg of the injectable form administered IM once weekly. It should be given with food.

Doses may vary in different species, when the drug is given by a different route or concurrently with other medications, and with regards to a patient's age, breed, and health status. A veterinarian's dosing instructions and/or those printed on the medication label should be followed closely.

If a dose of stanozolol is missed, it should be administered as soon as possible. If it is almost time for the next dose, the missed dose should be skipped and the normal schedule resumed. Two doses of this medication should not be given at once.

This information is for general reference only and should not be used for the diagnosis or treatment of any condition of your pet. It's intended as a general reference, this information may not include all possible uses, precautions, directions, reactions (including allergic), drug interactions, or withdrawal times. Always consult your local veterinarian and have your pet examined for any advice concerning the diagnosis and treatment of your pet, including which products and doses are most appropriate. Any trademarks are the property of their respective owners. VetDepot is not a pharmacy. All prescription products are dispensed by our Pharmacy Partner. Article last updated 2/2014.