Gastrointestinal: Nausea, vomiting, diarrhea. Hematologic: Bleeding in patients on concomitant anticoagulant therapy. Breast: Gynecomastia. Larynx: Deepening of the voice in women.

Does Winstrol convert to estrogen?

Not like many other anabolic steroids, Winstrol does not convert into estrogen, which is certainly one of its most essential advantages. Steroids that convert into estrogen inside the physique can result winstrol in serious unwanted side effects for male users.

Can stanozolol cause gynecomastia?

In addition, due to its 5α-reduced nature, stanozolol is non-aromatizable, and hence has no propensity for producing estrogenic effects such as gynecomastia or fluid retention.