Winstrol is the brand name for stanozolol, a synthetic 17α-alkylated anabolic-androgenic steroid (AAS) derived from dihydrotestosterone. It is available in oral tablet and injectable forms. The 20mg tablet strength is one of the dosage forms that has appeared in certain formulations or compounding contexts.
Medical Uses
Stanozolol has been used medically for:
• Hereditary angioedema (to help reduce the frequency and severity of attacks)
• Certain anemias and conditions involving deficient red-cell production (historical use)
• Support of weight gain or muscle preservation in specific catabolic states under strict medical supervision
In the United States it remains a prescription-only medication. Current approved indications are limited, and safer alternatives are often preferred. Therapy requires ongoing medical monitoring.
Mechanism of Action
Stanozolol acts as an agonist of the androgen receptor. It promotes protein synthesis and nitrogen retention and has relatively strong anabolic effects with moderate androgenic activity. As a 17α-alkylated compound, the oral form is bioavailable but carries elevated risk of hepatic stress.
Medical Dosing (Prescription Only)
Dosing is individualized by a physician. Historical oral regimens for approved indications have varied; exact dose, duration, and monitoring schedule are determined clinically. Self-dosing or non-prescribed use is inappropriate and illegal.
Significant Side Effects & Risks
Stanozolol carries well-documented risks, especially with prolonged, high-dose, or unsupervised use:
• Hepatotoxicity — elevated liver enzymes, cholestatic jaundice, and rare cases of more serious liver injury
• Androgenic effects — acne, increased body/facial hair, male-pattern hair loss, voice deepening, clitoral enlargement and menstrual changes in women
• Suppression of natural testosterone production and potential testicular atrophy
• Adverse lipid changes (often marked reduction in HDL cholesterol)
• Fluid retention or joint/tendon stress in some individuals
• Cardiovascular strain and potential long-term cardiac risks
• Mood or psychiatric effects in susceptible individuals
Women and adolescents face particularly high risk of irreversible virilization. It is contraindicated in pregnancy, known or suspected prostate or male breast cancer, severe liver disease, and certain other conditions.
Regular laboratory monitoring is essential when prescribed. Long-term cardiovascular and hepatic safety for non-medical use has not been established.
Legal & Regulatory Status
• United States: Schedule III controlled substance. Prescription only.
• Banned by WADA and virtually all major sporting organizations.
• Illegal to possess or distribute without a valid prescription in the United States and many other countries.
Unregulated products sold online as “Winstrol,” “Stanozolol,” or research chemicals carry additional risks of contamination, incorrect dosing, and legal consequences.
Strong Recommendation: Use only under the direct supervision of a qualified physician for an approved medical indication. Do not attempt to obtain or use this substance for bodybuilding, performance enhancement, aesthetic purposes, or any non-prescribed reason. Non-medical use is both illegal and medically hazardous.





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