The androgens are steroids that develop and maintain primary and secondary male sex characteristics.

Androgens are derivatives of cyclopentanoperhydrophenanthrene. Endogenous androgens are C-19 steroids with a side chain at C-17, and with two angular methyl groups. Testosterone is the primary endogenous androgen. In their active form, all drugs in the class have a 17-beta hydroxy group. 17-alpha alkylation (methyltestosterone) increases the pharmacologic activity per unit weight compared to testosterone when given orally.

Methyltestosterone, a synthetic derivative of testosterone, is an androgenic preparation given by the oral route in a capsule form. Each capsule contains 10 mg of Methyltestosterone USP. It has the following molecular formula: C₂₀H₃₀O₂ and molecular weight of 302.46. It has the following structual formula:

It is designated chemically as: 17-b-hydroxy-17-methylandrost-4-en-3-one

Methyltestosterone occurs as white or creamy white crystals or powder, which is soluble in various organic solvents but is practically insoluble in water.

Each capsule, for oral administration, contains 10 mg of Methyltestosterone. In addition, each capsule contains the following inactive ingredients: Corn starch NF, Gelatin NF, FD& C Blue #1, FD& C Red #40.

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