Although anabolic androgenic steroids like Stanozolol may increase lean muscle mass, strength, and the ability to train longer and harder, the serious side effects of steroids are many and may not be reversible. The minor side effects of steroid use include acne, oily skin, excess hair growth, and deepening of the voice. The major side effects of steroid use include an increased risk of cancer, increased risk of heart and liver disease, jaundice, fluid retention, reduction in HDL-C (“good cholesterol”), high blood pressure, changes in blood coagulation, increased risk of atherosclerosis, swelling of the soft tissues of the extremities (edema), and obstructive sleep apnea.
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. [ Ref ]
Of concern to any user of Winstrol during a cycle should be its intoxicating effect on the liver . The drug is a 17aa structured steroid , meaning it has been structured in a way which allows it to be orally bio-available, yet this has the negative effect of making Winstrol potentially harmful to the liver. It is therefore paramount the duration of a Winstrol cycle is limited, the dose of the drug is not excessive, the user does not stack it with other hepatotoxic compounds, does not drink alcohol whilst on cycle, and does not use Winstrol if they have an underlying medical condition which effects the livers health. There are supplements available which also help protect the liver (Milk Thistle, Liv-52 etc), and these would be advisable during any Winstrol cycle .