Winstrol Side Effects

Generic Name: stanozolol

Note: This page contains side effects data for the generic drug stanozolol. It is possible that some of the dosage forms included below may not apply to the brand name Winstrol.

It is possible that some side effects of Winstrol may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

For the Consumer

Applies to stanozolol: oral tablet

In rare cases, serious and even fatal cases of liver problems have developed during treatment with stanozolol (the active ingredient contained in Winstrol) Contact your doctor immediately if you experience abdominal pain, light colored stools, dark colored urine, unusual fatigue, nausea or vomiting, or yellowing of the skin or eyes. These may be early signs of liver problems.

If you experience any of the following serious side effects, contact your doctor immediately or seek emergency medical attention:

  • an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives);

  • swelling of the arms or legs (especially ankles);

  • frequent or persistent erections, or breast tenderness or enlargement (male patients); or

  • voice changes (hoarseness, deepening), hair loss, facial hair growth, clitoral enlargement, or menstrual irregularities (female patients).

Other less serious side effects may also occur. Talk to your doctor if you experience

  • new or worsening acne;

  • difficulty sleeping;

  • headache; or

  • changes in sexual desire.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

For Healthcare Professionals

Applies to stanozolol: oral tablet

Cardiovascular

Cardiovascular effects may be precipitated in patients adversely affected by fluid retention. Edema, with and without congestive heart failure, has occurred during anabolic steroid therapy.

Genitourinary

Genitourinary effect following chronic administration and/or large dosages of anabolic steroids can result in oligospermia and decreased ejaculatory volume. Elderly male patients may experience prostatic enlargement resulting in urinary obstruction. Priapism and excessive stimulation may develop.

In female patients the use of anabolic steroids may result in virilization including deepening voice, hirsutism, acne, clitomegaly (not reversible), and menstrual abnormalities. Discontinuation of medication at signs of mild virilization may prevent irreversible virilization.

Alterations in libido may occur (increased/decreased).

Hepatic

Life-threatening peliosis hepatis and hepatic abnormalities including hepatic neoplasms and hepatocellular carcinomas have occurred following prolonged therapy with high doses of anabolic steroids. Tumor regression did not occur in all cases following medication withdrawal.

Cholestatic hepatitis, jaundice, and abnormal liver function tests occur at relatively low doses.

Other

In female patients the use of anabolic steroids has resulted in virilization including deepening voice, hirsutism, acne, clitomegaly (not reversible), and menstrual abnormalities. Discontinuation of stanozolol (the active ingredient contained in Winstrol) at signs of mild virilization may prevent irreversible virilization.

Musculoskeletal

Androgenic activity associated with anabolic steroids is involved in termination of linear bone growth by closure of the epiphyseal growth centers. Appropriate monitoring of bone age is recommended during stanozolol (the active ingredient contained in Winstrol) use in prepubertal patients.

Oncologic

Oncologic effects following prolonged therapy with large doses of anabolic steroids have included hepatic neoplasms and hepatocellular carcinomas.

Hematologic

Hematologic effects occurring during anabolic steroid therapy include alteration in clotting factors II, V, VII and X , prolonged prothrombin time (PT), and increased red cell production.

Endocrine

During exogenous administration of anabolic steroids, endogenous testosterone release is inhibited through feedback inhibition of pituitary luteinizing hormone (LH). Large doses of exogenous anabolic steroids may suppress spermatogenesis through inhibition of pituitary follicle stimulating hormone (FSH).

Decreased glucose tolerance requiring adjustments in hyperglycemic control has occurred in diabetic patients during anabolic steroid therapy.

Metabolic

Metabolic effects occurring during anabolic steroid therapy in immobilized patients or those with metastatic breast disease include osteolytic-induced hypercalcemia.

Anabolic steroids effect electrolyte balance, nitrogen retention, and urinary calcium excretion. Edema, with and without congestive heart failure, has occurred during anabolic steroid therapy.

The androgenic activity of anabolic steroids may decrease levels of thyroxin-binding globulin, resulting in decreased total T4 serum levels and increased resin uptake of T3 and T4. Free thyroid hormone levels remain unchanged, however, and there is no clinical evidence of thyroid dysfunction.

Significant increases in low density lipoproteins (LDL) and decreases in high density lipoproteins (HDL) have occurred.

Renal

Anabolic steroids cause retention of nitrogen, sodium, potassium, chloride, water and phosphorus, and decrease urinary excretion of calcium. Patients should be instructed to report edema.

Gastrointestinal

Gastrointestinal effects occurring during stanozolol (the active ingredient contained in Winstrol) therapy include nausea and vomiting.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.

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