Chemical name: 1α-Methyl-17β-hydroxy-[5α]-androstan-3-one
Formula: C20H3O2
Anabolic activity index: 150%
Androgenic activity index: 40%

Proviron, with the active ingredient mesterolone, is a medication used in certain medical conditions, particularly those related to male health. Here’s a comprehensive description:

1. Classification and Mechanism of Action:

• Proviron is classified as an androgen and anabolic steroid (AAS). Its active ingredient, mesterolone, is a synthetic derivative of dihydrotestosterone (DHT).
• Mesterolone is known for its androgenic properties, which means it interacts with androgen receptors in the body, influencing various physiological processes.

2. Medical Uses:

• Proviron is not commonly used for therapeutic purposes in mainstream medicine. However, it may be prescribed in some cases to treat conditions such as male hypogonadism, a condition characterized by insufficient testosterone production.
• It may also be used to support fertility in men with certain reproductive health issues.

3. Androgen Replacement Therapy:

• In cases of male hypogonadism, Proviron may be prescribed as part of androgen replacement therapy to address low androgen levels.

4. Bodybuilding and Sports Enhancement:

• Outside of medical uses, Proviron is sometimes used by bodybuilders and athletes for its androgenic effects. It is believed to enhance muscle hardness and definition, and it may be included in cutting cycles.

5. Estrogen Inhibition:

• Proviron is known to have a weak inhibitory effect on aromatase, an enzyme responsible for converting androgens into estrogens. As a result, it may help reduce estrogen-related side effects in some cases.

6. Dosage and Administration:

• The dosage of Proviron can vary based on the specific medical condition being treated or, in the case of non-medical use, individual goals and tolerance.
• It is typically administered orally in the form of tablets.

7. Side Effects:

• Common side effects of Proviron may include acne, oily skin, and increased facial or body hair.
• It has a lower risk of estrogenic side effects compared to some other anabolic steroids, but androgenic side effects are possible.

8. Precautions and Contraindications:

• Proviron is contraindicated in individuals with known hypersensitivity to mesterolone or any of its components.
• It should be used with caution in individuals with pre-existing liver conditions.

9. Monitoring and Medical Supervision:

• Proviron use, especially in non-medical contexts like bodybuilding, should be done under the supervision of a qualified healthcare professional.
• Regular monitoring of liver function and hormonal levels may be necessary.

10. Legal Status:

• The use of Proviron for non-medical purposes, such as performance enhancement in sports or bodybuilding, is often subject to legal restrictions and regulations.

It’s important to note that Proviron is a prescription medication, and its use should always be guided by a healthcare professional. The decision to use Proviron for non-medical purposes should be approached with caution, and individuals should be aware of potential risks and legal considerations.