Proviron is a brand name of androgen molecule specifically prescribed for men. Androgen is an essential hormonal group for the proper growth and functioning of the male reproductive system. Proviron contains mesterolone from the group of androgen hormones. This molecule is useful in improving the level of testosterone in the body. Mesterolone is a synthetic androgen that is acting upon oral administration and works as an agonist of androgen receptors. After the intake, it has studied that these molecules binding with the forms a hormone-receptor complex and binds with DNA and enhances DNA transcription and formation of mRNA which ultimately leads to modification of protein synthesis. It promotes the growth and development of male sex organs and secondary sexual characters and maintains proper sexual functioning.