(Instructions for medical use of therapeutic agents).]

Registration number Mfg: HP/DRUGS/W6765-66/1S.
Active substance: Mesterolone.
Packaging: Blister pack of tablets.
Dosage: 25 mg/tab of Mesterolone.
Category drugs: –źndrogens.

Pharmachologic effect: Androgen. During the replacement therapy, it stimulates the development of male genital organs and secondary sexual characteristics, increases libido and potency. It exhibits anabolic properties, increases the accumulation of protein in tissues, especially in muscle, accelerates bone growth and the rate of closure of the pineal glands, stimulates erythropoiesis.

Contraindications: Hypersensitivity.

Side effects: Frequent or prolonged erection.

Interaction: Significant drug interactions in the treatment of VIRON in conjunction with other drugs have not been identified.

Special instructions: Apply only to men. Regular prostate examination is recommended. It is not intended to stimulate the growth of muscle tissue in healthy individuals or to increase their performance.

Rarely, when using VIRON, the development of benign and malignant tumors of the liver was observed, leading in some cases to life-threatening abdominal bleeding. It is necessary to warn the patient about the need to inform the doctor about unusual pain in the upper abdomen.


Inside. Hypoandrogenia and impaired potency: at the beginning of treatment with VIRON - daily, 75 mg, until there is a noticeable improvement. In the future - daily, 25-50 mg of VIRON for several months. Hypogonadism: long-term treatment, for the formation of secondary sexual characteristics - 25-50 mg 3 times a day for many months. As a supportive therapy, administration of 25 mg 2-3 times a day is often sufficient. Male infertility: to improve the quality and quantity of sperm - 25 mg 2-3 times a day for 1 cycle of spermatogenesis (90 days). After a break, treatment is repeated for several weeks. To increase the concentration of fructose in the ejaculate, with post-pubertal insufficiency of Leydig cells: 25 mg 2 times a day for several months.

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