Methyltestosterone is a man-made form of testosterone, a naturally occurring male sex hormone, used in men and boys to treat conditions caused by a lack of testosterone, such as delayed puberty or other hormonal imbalances. Methyltestosterone is also used in women to treat breast cancer that has spread to other parts of the body.
The recommended dose of Methyltestosterone for replacement therapy in androgen-deficient males is 10 to 50 mg daily. The usual dosage of Methyltestosterone for androgen therapy in breast carcinoma in females is from 50-200 mg daily. Methyltestosterone may interact with blood thinners, or insulin or oral diabetes medications. Tell your doctor all medications and supplements you use. Methyltestosterone must not be used during pregnancy. It may harm a fetus. Consult your doctor to discuss birth control. It is recommended that women using this medication use 2 forms of birth control (such as condoms and birth control pills) while taking this medication. It is unknown if this drug passes into breast milk. It may affect milk production and it may harm a nursing infant. Breastfeeding while using this drug is not recommended.