Proviron (mesterolone) tablets 25 mg. №20


Androgen deficiency or male infertility caused by a primary or secondary decrease in the function of the sexual glands (hypogonadism) in men.



Proviron Composition
active substance: mesterolone;
1 tablet contains 25 mg of mestrolone;
Excipients: lactose monohydrate, corn starch, povidone, methyl parahydroxybenzoate (E 218), propyl parahydroxybenzoate (E 216), magnesium stearate.

Dosage form

Pharmacological properties
Eliminates the effects of androgen production disorders that occur with age. Therefore, Proviron® is suitable for the treatment of conditions caused by insufficient endogenous androgen production. Mesterolone does not impair spermatogenesis. Mesterolone is very well tolerated by the liver. Proviron® stimulates the growth, development and functioning of target organs that depend on androgen exposure. It promotes the development of secondary sexual characteristics in prepubertal conditions of androgen deficiency. Proviron also eliminates the symptoms of deficiency in cases where the functioning of the gonads stops after puberty.
The use of the drug Proviron can significantly improve or normalize the quantity and quality of sperm, as well as the concentration of fructose in the ejaculate, thereby increasing the possibility of conception.

Androgen deficiency or male infertility caused by primary or secondary decreased gonadal function (hypogonadism) in men.


  • Prostate cancer (because androgens can stimulate the growth of existing cancer).
  • Liver tumors now or in the past.
  • Hypersensitivity to the active substance or to any of the components of the drug.

Method of application and dosage
Swallow the tablet whole with liquid.

  • If hypogonadism requires constant therapy
    For the development of secondary sexual characteristics, it is recommended to use 1-2 tablets of the drug Proviron 3 times a day for several months.
    A maintenance dose of 2-3 tablets of Proviron per day is sufficient in most cases.
  • Infertility treatment – improving the quantitative and qualitative characteristics of sperm –
    2-3 tablets of Proviron per day should be used during the cycle of spermatogenesis, namely about 90 days. If necessary, Proviron therapy can be repeated after a break of several weeks.
  • To increase the concentration of fructose in the ejaculate in post-pubertal Leading cell failure: higher concentrations of fructose can be achieved by using 1 tablet of the drug Proviron 2 times a day for several months.

Do not use in this category of patients.

According to studies of acute toxicity of a single dose, the drug Proviron® belongs to the category of non-toxic drugs. There is no risk of acute toxicity, even if the patient accidentally takes several therapeutic doses at once.

Side effects
If frequent or very prolonged erections are observed in some cases, the drug should be discontinued to avoid damage to the penis.
Allergic reactions were also observed in some cases.

Expiration date
5 years.

Storage conditions
Keep out of reach of children, does not require special storage conditions.