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Description of the drug

Mesterolone is an anabolic steroid used for promoting muscle mass and strength. It is a mild steroid with low risk of developing estrogen related side effects. It is a steroid that comes in form of tablets, and unlike other oral steroids, mesterolone is not hepatotoxic. Also, it is a weak steroid with low androgen activity; therefore it rarely may be used for replacement therapies. Its main advantage over other steroids is the fact that it is maintaining libido off-cycle and temporarily improves vascularity. One interesting fact about mesterolone is that it may be used as a pro-sexual agent in between cycles. As in case of other anabolic steroids, it is recommended to read all the information about the drug before starting to use it and specifically the following: effective doses, cycles, duration of therapy with it, potential side effects, benefits to the particular condition and desired results, interaction with other medicines and other.

Brand names

Most commonly, mesterolone is traded under the Proviron brand name.

What you should know before starting to use mesterolone?

It is important to exercise caution to certain aspects of this steroid before starting to use it. It is contra-indicated in the following cases:

·Do not take mesterolone if you have a known hypersensitivity to the drug, after a few days of taking the drug skin allergic reaction may occur.

·It should not be taken in adults less than 18 years old because it may cause the underdevelopment of sexual characteristics.

·Mesterolone is contra-indicated if the user has a history of previous or existing liver tumors, or any other form of cancer, such as prostate cancer, breast carcinoma and others, because it may stimulate the growth of cancer cells.

·Women should not take this drug if pregnant or breast-feeding.

·It is also not indicated the use of mesterolone in users with increased levels of calcium in the blood.


Prior to initiation of the cycles with mesterolone, all users are recommended to exercise caution to the following things:

·It is important to make periodic examinations of prostate gland in order to assess its function because it is considered that mesterolone may increase the rate of growth of prostate tumor’ cells.

·Exercise caution to the duration of taking mesterolone (Proviroxyl). Do not take the drug for too long and in high doses.

·Users with history of high blood pressure, diabetes and kidney impairment should exercise caution to the dose of mesterolone. If taken at the same time with other medicines, it may interfere with their mechanism of action and decrease it. Consult a pharmacist or a doctor with regard to this issue and set the doses so as to minimize the risks of developing any side effects.

·Get the most benefit from the therapy with this drug. It is possible that after a long period of time the drug does not produce effective results. If there are no results or these are minor, discontinue with it and replace it with a stronger steroid or combine it with another steroid in order to improve the existing results.

Effective doses and indications of use

As already mentioned, mesterolone comes in form of tablets of 25 mg which makes it very easy to administer. It is indicated to start the therapy with a lower dose and increase it until the most suitable one and maintain it for the whole period of time. The recommended initial dose is three to four tablets daily for the first two months. During the maintenance phase it is recommended a dose of two or three tablets daily. The length of taking the drug is up to six months. However, if the results are obtained in a shorter period of time, there is no need to take the drug further.

Tablets should be taken orally, with or without food. The recommended dose may be taken at once or divided in several doses. Try to take the tablets at the same time everyday in order to avoid missing doses.

What should I do if I missed a dose?

If it happened to miss a dose, do not worry; take it as soon as you remember. However, if it is already too late to take the skipped dose, leave it and get back to your normal schedule. Do not take a double dose to make up for the skipped one. If you have any questions related to this issue, consult a pharmacist.

Possible side effects with mesterolone

As in case of other anabolic steroids, mesterolone may cause side effects. The most common ones are generally short in action and are not bothersome. Usually, these disappear after a period of taking the drug. However, it is indicated to not tolerate even minor side effects and discomfort. Decrease the doses for a period of time until these disappear and then return to your normal schedule.

The most common side effects with mesterolone are the following:


·Abdominal pain;


·Increased blood pressure;

·Changes in mood;

·Nausea or vomiting;



Other side effects, such as frequent and persistent erections, changes in sexual desire and mostly decreased sexual desire may also occur. If any symptoms related to the enumerated side effects develop, discontinue with the drug and replace it with a more safe steroid.

As mesterolone is considered to not cause estrogen related side effects, these are also a possibility. If you notice increased body hair, or hair loss, acne, swollen ankles or feet, symptoms of gynecomastia decrease the dose and combine mesterolone with other drug that will improve the symptoms.

How should I store the drug?

It is indicated to keep mesterolone in a clean and dry place at the room temperature. Do not leave the drug at the reach of children. Do not store it in the bathroom or at the direct sunlight exposure. Safely discard the drug if no needed. If you need more assistance, consult a pharmacist.

Mesterolone (Proviroxyl,Proviron,Providex,Provimed,Proviron-lab)