– Manufacturer: Schering
– Substance: Mesterolone
– Pack: 25 mg/tab. (10 tab.)


MESVIRON 25 is used to treat potency disturbances, infertility, declining physical & mental alertness in the aging male. It is an oral androgen which does not aromatize into estrogen. In clinical situations is generally used to treat various types of sexual dysfunction, which often result from a low endogenous testosterone level. It can usually reverse problems of sexual disinterest and impotency, and is sometimes used to increase the sperm count. The drug does not stimulate the body to produce testosterone, but is simply an oral androgen substitute that is used to compensate for a lack of the natural male androgen. It is also effective act as an anti-aromatase in the body, actually preventing or slowing the conversion of androgens into estrogens. Mesterolone has an extremely high affinity for binding to plasma proteins such as SHBG (binding globulin in the sex hormones).This makes mesterolone enhance the activity of other anabolic steroids. Among athletes, mesterolone is primarily used to increase androgen levels in the diet or in preparation for competition. It is well known for its anti-estrogenic effect, due to his own ability to antagonize the aromatase enzyme. When taking Mesterolone, given are some of increases in muscle, even if minimal, more or less it’s about muscle hardness and density. It is known that androgen receptors are found in the muscle and in fat cells and therefore, the use of Mesterolone together with testosterone promotes muscle growth but also a loss of fat. Mesviron, as the direct replacement of a male hormone testosterone, disables the process of aromatization in the body. It is thus a very useful compound in cycles containing steroids with tendency to aromatize, because it minimalizes the risk of gynecomastia. Mesviron has its own anabolic effects, as well. The result of its use is the growth of hard and tight muscles. The average dose for men is in the range of 25 to mg in one day. Women should not exceed 25 mg in a day; however, they should avoid using Mesviron completely. For the best results, it is usual, that Mesviron is combined with tamoxifen citrate or clomiphene citrate. Mesviron is not only an excellent anti-estrogen : Maintaining a low level of estrogen, Mesviron also reduces water retention. It gives the user the ripped look sought by many bodybuilders, especially when preparing for competitions. It should be noted that Mesviron tends to limit muscle gains due to a steroid cycle since it attaches to androgen receptor cells instead of other steroids in the body, which are then blocked out and therefore ineffective. This is why many bodybuilders take a minimal dose of Mesviron, just to avoid gynecomastia. Regarding the side effects of mesterolone, they are rare below 100 mg per day. Indeed, tablets of Mesviron are not alpha-alkylated 17 and create no harm to the liver. But if we start to exceed the 75 to 100 mg daily, frequently emerging phenomena such as priapism (painful situation in which the penis after erection does not regain its normal flaccidity) in men or virilization in women.