Mesterolone, also known as Proviron, is an androgenic anabolic steroid that was first created in 1966 and established for medical use a year later. The steroid was used to treat of low testosterone levels, androgen deficiency in males (hypogonadism), anemia, to support male fertility, and delayed puberty in boys.

Proviron has no estrogenic effects and does not aromatize into estrogen. It even has aromatase inhibiting properties and therefore can be used to treat breast tenderness or gynecomastia in men. The steroid is also strongly androgenic, weakly anabolic and not progestogenic in any way.

See our article about Cypionate vs Enanthate

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When to use Mesterolone?

Proviron in bodybuilding is typically used as an addition to a steroid cycle since its mild effects will not produce too many results when used alone. It is a versatile steroid that can be used during a cutting to reduce water and fat retention, or it can even be used as an aromatase inhibitor during the cycle, as well as during post-cycle therapy, where strongly aromatizing steroids were used in the cycle. 

Proviron bodybuilding dosage

Men are advised to take a proper Proviron dosage of no more than 50-100mg daily to gain the full benefits of the steroid and avoid side effects. The Proviron cycle length for males can be up to 12 weeks.

Women are advised not to take more than one 25mg tablet per day. Higher doses and a duration of intake of more than 4 weeks, can lead to the increase and the risk of masculinization phenomena. Female athletes who do not have problems or intolerances to Proviron achieve good results by taking just 25mg of Proviron and 20mg of Tamoxifen per day. They say that in combination with a good diet, there is an accelerated burning of fat and a rapid hardening of the muscles. Which can be very beneficial to most female athletes.

Read More Article What is Winstrol used for

Overdose on Proviron: Why is it dangerous?

For athletes who are used to working under the motto of “more is better”, taking Proviron like this could cause something paradoxical. The instructions for use of the drug state that a high Proviron dosage can lead to a delay in the body of electrolytes and water and as a result, lead to edema fluid build-ups.

Contraindications for Proviron

• Heart failure decompensation.
• Acute and recovery phase of myocardial infarction.
• conduction disorders of the heart muscle.
• Severe hypertension.
• Acute liver and kidney disease with severe dysfunction.
• Peptic ulcer and 12 duodenal ulcer in the acute stage.
• Hypertrophy of the prostate.
• Atony of the bladder.
• Pyloric stenosis, paralytic ileus.
• Simultaneous treatment of MAO inhibitors.
• Pregnancy, lactation.
• Children under 6 years of age.
• Hypersensitivity to Proviron.

Mesterolone most common side effects

Side effects of Proviron in men at a dose of 50-100mg per day are extremely small, so that it can be taken relatively safely for more than several weeks in combination within a steroid cycle. It is very well tolerated by the liver and does not cause liver dysfunction at these dosages.

Perhaps the most common side effect of Proviron here is pronounced sexual hyper stimulation and, in some cases, a prolonged erection of the penis. As this condition is painful and can cause all sorts of damage, it makes sense to reduce the dose of the drug or stop using it at all if these issues occur.

Female bodybuilders should use Proviron with caution because all kinds of androgenic side effects are not excluded.

See also Oxandrolone cycle

Proviron cycle instruction

Proviron is only available as an oral steroid typically in a dosage of 25mg in each tablet. The Proviron dosage is determined individually for each athlete and can vary in the range of 25mg to 100mg per day.

Proviron’s half-life is about 12-13 hours, therefore we recommend dividing the daily dose into 1-2 smaller doses to increase the drugs efficiency. Wash down the tablets with a sufficient amount of water without chewing the avoid affecting the effectiveness of the drug.

The length of use is determined by the purpose of using Proviron. If it taken during post-cycle therapy (PCT), then the steroid will only need to be taken for the full length if PCT. This is typically 4 weeks. Alternatively, if Proviron is taken during the steroid cycle, it can be taken throughout the cycle, or for the last few weeks of the cycle for a boost in muscle hardening and definition.

Combinations of Proviron with other drugs

You can stack Proviron with almost any other steroid, but its effects are better when it is used in cutting cycles. Cutting steroids that can be combined with Proviron in a cycle are Anavar, Trenbolone, Winstrol, Masteron and Turinabol.

Read about Turinabol cycle details

When taking Proviron for PCT, it should not be the only drug used. For an effectively post-cycle therapy, Proviron should be combined with other anti-estrogens like Clomid and Nolvadex, or a drug like Gonadotropin (HCG).

Learn more about HCG use in Bodybuilding

Proviron results before and after

Proviron increases libido, makes the muscles drier and better quality, increases their density and definition. Also, its undoubted advantage is that it increases the effectiveness of other steroids with which it is used together during the cycle.

Proviron reviews from real bodybuilders

Reviews of Proviron by bodybuilders are positive since the drug is extremely useful in certain circumstances. Novice steroid users, who don’t yet know how to take this steroid to their advantage will likely be the ones writing any negative Proviron reviews.

Proviron use by experienced bodybuilders is extremely common before a bodybuilding competition to get the physique hard, dry, and camera-ready for the show. 

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