Proviron (Proviron; generic name Mesterlone) from Schering balances a deficiency of male sex hormones (androgen) formation, which begin to fall gradually with increasing age. Proviron (Proviron; generic name Mesterlone) from Schering is used to treat a condition called hypogonadism. It does this by replacing the bodies natural hormone testosterone when not enough is made by the body.
Testosterone is a natural male hormone, known as an androgen, which controls normal sexual development in men. Testosterone is essential for the development and maintenance of the male reproductive organs as well as other male characteristics, such as deep voice, increased muscle strength, hair growth etc.