Final answer:
Testosterone and methyltestosterone are synthetic variations of the male sex hormone testosterone. They bind to and activate androgen receptors, promoting muscle growth. They are used to treat delayed puberty, hypogonadism, and breast cancer, but can have potential toxicities like liver damage and mood changes.
Step-by-step explanation:
Testosterone and methyltestosterone are both synthetic variations of the male sex hormone testosterone. Their mechanism of action involves binding to and activating androgen receptors in various tissues, leading to an increase in protein synthesis and muscle growth. Clinical uses of testosterone and methyltestosterone include the treatment of delayed puberty, hypogonadism, and breast cancer. However, these drugs can also have potential toxicities, such as liver damage, cardiovascular problems, aggression, and mood changes.