Magnum Primo 100



Magnum Primo 100 or Primobolan (Methenolone enanthate) is an anabolic steroid derived from dihydrotestosterone. However, it does not have the effects of its chemical precursor. In medicine, this drug is used to treat anemia in women and even children. Methenolone acts gently, but steadily, both on beginners, using AAS (androgen-anabolic steroids) for the first time, and on veterans of the steroid front. There is both an injection and an oral release form of Primobolan. But the latter practically does not work and is almost never used in sports.

Effects of Primobolan:

  • Weak anabolic effect with a small androgenic effect
  • Minor risk of undesirable side effects.
  • Eliminated the likelihood of gynecomastia, due to the fact that metenolone is not converted to estrogen.
  • Weak rollback phenomenon.
  • Primobolan does not increase cholesterol levels. There is also no increase in blood pressure.
  • There is an opportunity at times to increase the anabolic effect. To do this, you need to exceed the weekly dosage of 500 mg. This equates Primobolan to many medium-level steroid drugs.


Side effects

Primobolan is almost devoid of side effects, does not aromatize and does not possess progestogenic activity. Its androgenic activity is also very small, and even testosterone production is practically not suppressed when using metenolone. If your course consists only of Primobolan, then you, of course, do not gain a lot of muscle mass, but, most likely, it will not go away after the course.

Thus, primobolan does not have to wait for any noticeable side effects, especially if you do not use the maximum dosages.


Working dosages of methenolone enanthate are 400–1000 mg per week for men and 200–400 mg for women. The half-life of primobolan is 6-7 days. Therefore, the injection is best done 1-2 times a week.

Additional information