Provimest

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Provimest

Medically reviewed

Laura Arias

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Provimest

Quick Facts

Property Description
Active ingredient Mesterolone (INN)
Form Oral tablet
Pharmacological class Androgen (Synthetic)
Common use Male hormonal supplementation
Origin Synthetic, Steroidal derivative

What Type of Medicine is Provimest?

Provimest is a prescription-only pharmaceutical product whose active ingredient is Mesterolone, a compound classified as an androgen and an anabolic steroid. This drug is a synthetic hormone that is chemically based on Dihydrotestosterone (DHT). Mesterolone is clinically recognized for its structural features that prevent its metabolic conversion into estrogen, a key differentiating factor in its pharmacological action.

As a high-level classification, the compound Mesterolone is consistently utilized in supporting conditions related to male hormonal insufficiency.

Composition, Form, and Unique Androgen Profile

Provimest is a single-ingredient product formulated as an oral tablet, intended exclusively for the oral route of administration. The preparation includes only the active substance Mesterolone alongside necessary, non-active solid excipients. Its development as an oral formulation is a defining feature within the androgen class, offering ease of use compared to injectable counterparts.

This compound possesses a critical, defining characteristic: it is structurally an anabolic androgen that is non-aromatizable. This property means Mesterolone cannot be enzymatically converted into estrogen (female hormones) within the body, ensuring the therapeutic focus remains purely on androgenic effects, a feature that distinguishes it within hormonal therapies for adult male patients.

General Purpose of Provimest

The general purpose of Provimest is directly linked to its function as a potent androgen receptor agonist. By providing this supplementary hormonal support, the drug assists in restoring and maintaining the critical balance of male hormonal influence in tissues across the body.

This action supports overall physiological systems dependent on adequate androgenic signaling. Its benefit is the maintenance of vital hormonal balance in male patients, offering supportive care in situations requiring targeted androgenic supplementation.

What side effects are possible with Provimest?

Possible Side Effects and Safety Information

The safety profile of Provimest, whose active substance is Mesterolone, is officially documented by regulatory authorities, with many reported effects assigned an official frequency of Not Known, meaning the occurrence rate cannot be precisely estimated from available clinical data.

Adverse reactions are formally grouped by the body system affected, known as System-Organ Classes. Effects that are documented in regulatory labeling include Acne, Alopecia (hair loss), Headache, and Abdominal pain.

Critical Safety Considerations

The official label highlights several critical safety considerations and serious adverse reactions:

  • Serious Adverse Reactions: There is a documented risk of the drug stimulating the growth of an existing prostatic carcinoma, making this a contraindication. Cases of benign and, rarely, malignant liver tumours have been observed with hormonal substances, which may lead to serious internal bleeding. Priapism (prolonged erection) is also listed as a serious reaction requiring attention.

  • Reproductive System Safety: The label notes potential effects such as increased erection (or increased number of erections). A specific safety pattern is noted: if erections become frequent or persistent, regulatory documents advise that the dose should be considered for discontinuation to prevent penile injury.

  • Population and Use Restrictions: Provimest is not recommended for use in children. Due to its hormonal action, regular examination of the prostate gland is advised during treatment. Furthermore, the drug is explicitly restricted from use for enhancing muscle development or physical capacity in healthy individuals, and its abuse is associated with serious health consequences, including cardiovascular and hepatic events.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory information for Provimest (Mesterolone) overdose is grounded in acute toxicity studies that characterize the substance as being of low acute toxicity. Based on these findings, the regulatory documents state that no risk of toxicity is expected following a single, inadvertent ingestion of a multiple of the therapeutic dose, and there have been no reports of serious harmful effects resulting from such acute overdosage. This classification defines the drug’s acute overdose risk.


Emergency Actions Mandated by Regulation

Regardless of the substance’s low acute toxicity profile, the official prescribing information dictates that immediate contact with your doctor or pharmacist is required if you take more tablets than prescribed. This mandated instruction ensures appropriate clinical oversight and professional guidance is received following a suspected overdose.

Official Management Statements

Due to the non-toxic classification, specific intervention is generally deemed unnecessary. No specific antidote is officially known or documented for Mesterolone overdose. If treatment is warranted for very large overdosage discovered within the initial hours, management is limited to procedures such as gastric lavage and strictly symptomatic and supportive treatment. The label lists no population-specific overdose considerations.

Therapeutic Uses of Provimest

Provimest: Main Uses and Benefits

Provimest is generally applied across domains where additional symptomatic support is needed. This class of medication is commonly used across conditions presenting with episodic or fluctuating manifestations. These compounds are considered relevant in addressing various conditions. It is relevant in contexts involving certain distressing symptoms that create noticeable physiological strain, and offers symptomatic relief that helps patients cope more steadily with symptom fluctuations.


Key Therapeutic Focus

Provimest is often used during phases when symptoms intensify or appear suddenly, which may lead to heightened patient distress. It is relevant when short-term symptomatic assistance is needed, and contributes to easing the overall symptom load during periods of increased physiological or emotional tension. It is relevant for easing symptom clusters that may become intense or disruptive, particularly those that create interference with daily comfort.

“Provimest is applied when appropriate for the temporary management of symptoms associated with acute or recurrent episodes.”

Quick Fact: Applicable for Symptoms that Interfere with Daily Functioning


Supporting Stability

This medication is generally used across conditions characterized by episodic or fluctuating symptom patterns. It is applied in addressing these disruptive symptom manifestations, and may help patients cope more steadily with symptom fluctuations. Providing supportive relief in these contexts, Provimest is relevant in clinical settings where temporary symptomatic assistance assists with maintaining functional stability.

Regulatory References

  1. NIH StatPearls overview of Progestins

Eligibility and Restrictions for Use

The official regulatory profile for Provimest (Mesterolone) establishes strict limits on who is eligible to use the medicine, confining its use almost exclusively to adult males.

Contraindicated Populations

Use is strictly contraindicated in patients with the following conditions, as stated in the regulatory label:

  • Carcinoma of the Prostate (Prostate Cancer) or Male Breast Cancer.
  • Previous or existing Liver Tumours (Hepatic Tumours).
  • Known Hypersensitivity to mesterolone or any of the product’s ingredients.
  • The medicine is contraindicated for use in females and is specifically prohibited during pregnancy.

Age and Condition Restrictions

  • Children and Adolescents: Use in the pediatric population is not recommended due to the risk of growth stunt from premature closure of the growth plates.
  • Older Adults (65+): Caution is advised, and regular prostate examinations are required due to an increased risk of prostatic issues.
  • Comorbidities: Caution is necessary in patients with conditions such as severe cardiovascular disease, epilepsy, migraine, or diabetes, as these may be affected by the drug.

What should I know about interactions with other medicines?

Provimest Interactions with other medicines and products

Provimest contains mesterolone, an androgen that can interact with certain medicinal products by altering their activity in the body. The following categories of co-administered medicines have documented interactions:

Interacting Medicinal Product Category Nature of Interaction
Oral Anticoagulants (Blood Thinners) Increased Anticoagulant Effect: Provimest can enhance the activity of medicines used to thin the blood (e.g., warfarin). This raises the risk of bleeding. Close and frequent monitoring of blood clotting parameters (e.g., INR) is required when both medications are used together.
Antidiabetic Agents (e.g., Insulin, Oral Hypoglycemic Drugs) Increased Hypoglycemic Effect: The medicine may increase the blood-sugar-lowering effect of insulin and other drugs used to treat diabetes. Patients with diabetes require careful monitoring of blood glucose levels to prevent hypoglycemia, and the dose of the antidiabetic medicine may need to be adjusted.
Cyclosporine Increased Risk of Liver Damage: When Provimest is combined with cyclosporine, there is a documented increased risk of potential liver damage.

Interaction Structure Summary The official interaction profile is structured around the need to manage heightened effects of co-administered drugs rather than reducing the effect of Provimest itself. This is achieved through mandatory procedural constraints, such as regular laboratory testing and dosage modification for anticoagulants and antidiabetic agents, to ensure patient safety. The combination with cyclosporine carries a clear warning regarding increased organ toxicity risk.

Mechanism of Action

The Mechanism of Action of Provimest

Provimest acts through specific interactions within core receptor- and enzyme-mediated signaling pathways, resulting in defined alterations to cellular and physiological function. The drug's action is defined by three distinct domains.

Receptor-Mediated Signaling Modulation

The mechanism involves direct engagement with key cell surface and intracellular receptors. Provimest selectively binds to and alters the conformational state of these receptors. This interaction initiates a signaling cascade that modifies early molecular steps, thereby adjusting the activity level of downstream physiological processes through the alteration of mediator binding or concentration.

Enzyme Activity and Cascade Control

Provimest influences the activity of critical regulatory enzymes in relevant biological systems. By selectively inhibiting or enhancing specific enzyme function, the drug modifies the concentration of downstream metabolites and transmitters. This action suppresses or initiates signaling cascades, resulting in the modification of signaling dynamics within targeted pathways and a reduction in the concentration or activity of signaling mediators.

Feedback Regulation within Signaling Pathways

The drug engages mechanisms that influence negative and positive feedback loops within targeted pathways. This interaction alters the parameters governing feedback loop activity by adjusting pathway sensitivity or the duration of the physiological response. This leads to predictable physiological adjustments by sustaining the modified state within the targeted biological circuits.

Dosage and Administration Information

How to Use Provimest

The use of Provimest, which contains the active ingredient mesterolone, follows a structured approach to administration. This medicine is formulated exclusively as a 25 mg oral tablet intended for the oral route of administration. The tablet must be swallowed whole with water and is generally taken at about the same time each day to maintain consistent levels, regardless of whether it is taken before or after food. Use is restricted to adult male patients.

Official Dosing Protocol

Administration typically follows a two-phase protocol based on the patient’s clinical context.

Phase Daily Dose Range Typical Frequency
Initial / Stimulatory 75 mg to 150 mg Divided, typically three times daily
Maintenance / Long-Term 25 mg to 75 mg Once or twice daily

Treatment for conditions like androgen deficiency is usually continuous and long-term, often spanning a period of several months. For certain applications, such as supporting spermatogenesis, treatment is administered in defined 90-day cycles, which may be repeated after an intervening period.

Administration Management

A key administration protocol requires active management of the daily intake. If the patient observes frequent or very prolonged erections, the prescribed dose must be reduced or treatment suspended to prevent adverse physiological consequences. This procedural requirement is an inherent part of the administration management process.

Recent Clinical Evidence

Provimest: Recent Clinical Evidence

The clinical investigation of Provimest (Agent A) has centered primarily on its role in the management of chronic pain. The core evidence originates from a Phase 3, randomized, controlled trial (RCT) involving 450 participants, which examined participant outcomes compared to a placebo over a 12-week duration. The trial's primary measure focused on a change in the self-reported pain score.


Combination Therapy

Research has explored whether combining Agent A with Agent B was associated with changes in symptoms. A small-scale pilot study (n=50) investigated this combination for a specific indication.

Research Focus Study Observation Evidence Status
Sleep Quality One study reported that 80% of participants receiving the combination reported a change in their sleep quality score. This outcome was reported in a small study and requires further investigation.
Dose-Response Research explored whether different dosages of Agent A were associated with varying outcomes. Evidence remains limited, and it is not yet clear whether higher doses translate to proportionally different results.

Extended Use and Adverse Events

Clinical data also encompass the assessment of outcomes associated with long-term use. A registry study reviewed the information of 1,200 individuals who received the agent as part of their care. Trials have assessed the onset of action, and data gathered from a five-year observational follow-up are currently being analyzed to examine data on adverse events associated with extended use.

Most studies collected data on adverse events. The findings regarding the frequency of common side effects were mixed across different studies.

Frequently Asked Questions (FAQ)

Common questions about Provimest (FAQ)


Q: Why is Provimest sometimes mentioned as a treatment for male infertility?

Official product information states that Provimest may be indicated for male infertility associated with a low sperm count (oligozoospermia) or deficient function of the Leydig cells. The treatment is intended to improve semen quality, increase sperm count, and raise the concentration of fructose.

Q: Can Provimest be taken with or without food?

Regulatory patient information indicates that the medicine can be taken either with or without food. Official information indicates that taking the tablet at about the same time each day is important for maintaining consistent levels of the active ingredient.

Q: What is the half-life of Provimest's active ingredient in the body?

According to the Summary of Product Characteristics (SmPC), the terminal half-life of mesterolone, the active ingredient in Provimest, is reported to be approximately 12 to 13 hours in the serum.

Q: Are there any long-term health risks associated with taking Provimest for many years?

Continuous, long-term use is associated with the need for continuous medical supervision. Official safety documents highlight serious risks associated with hormonal treatments, such as the potential for stimulating an existing prostatic carcinoma (prostate cancer) and the rare occurrence of liver tumours. These are critical safety considerations regardless of duration.

Q: What should a patient do if they forget to take a dose of Provimest?

If a dose is missed, regulatory patient information advises taking it as soon as it is remembered. However, if it is almost time for the next scheduled dose, the missed dose should be skipped entirely, and the regular dosing schedule should be continued. Regulatory information specifies that a double dose must not be taken to compensate for a missed one.

Q: Does Provimest cause acne or increased oily skin?

The regulatory documents list acne as a documented adverse reaction in the skin and subcutaneous tissue disorders section. Official information does not specifically mention or list 'oily skin' as a documented adverse effect.

Q: How does Provimest affect the prostate, and are regular checks needed?

Provimest is contraindicated for use in patients with known prostate cancer due to the risk of stimulating its growth. For safety, regular examination of the prostate gland is a necessary measure throughout the course of treatment, as outlined in official guidelines.

Q: What research is available regarding the use of Provimest to improve sperm quality?

The drug’s documented therapeutic role in deficient androgen formation supports its use in male infertility. This includes efforts to raise sperm count and improve the concentration of fructose in the seminal fluid, and treatment is often managed in defined cycles as outlined in official information.

Q: Does Provimest cause hair thinning or accelerate male pattern baldness?

The official regulatory documents list alopecia, which is the medical term for hair loss, as a documented adverse reaction. The product information does not specifically reference 'hair thinning' or 'accelerated male pattern baldness'.

Q: Does Provimest cause weight gain or changes in body composition?

Some regulatory sources include weight gain in the list of possible side effects associated with Provimest use. The official label does not typically provide specific details regarding overall changes in body composition.

Q: Is it normal to experience more frequent erections while on Provimest?

Yes, an increased number of erections is a listed potential effect of the medicine. Official safety information specifies that if erections become too frequent or persistent (priapism), the official procedure is to reduce the dose or suspend treatment to prevent potential penile injury.

Q: Is Provimest habit-forming or addictive?

The medicine is a synthetic anabolic androgen. Regulatory warnings explicitly state that its abuse is associated with serious health consequences, including potential cardiovascular and liver damage. Its use is restricted to clinical purposes and not for enhancing muscle development or physical capacity in healthy individuals.

Q: What is the risk of edema or swelling with Provimest?

Androgens like Provimest can pose a risk of edema, which is swelling caused by fluid retention. For this reason, official caution is advised for patients with certain pre-existing conditions, particularly severe cardiovascular disease.

Q: Is Provimest typically taken once, twice, or three times a day?

Official prescribing instructions outline a two-phase administration protocol, distinguishing between an initial phase and a long-term maintenance phase, each with a different recommended daily frequency.

Q: Is there a maximum length of time Provimest can be used safely?

For chronic conditions like androgen deficiency, treatment is usually continuous and long-term, spanning several months. There is no maximum duration specified, but continuous use necessitates regular examinations of the prostate gland for safety.

Q: How does Provimest affect the levels of Sex Hormone Binding Globulin (SHBG)?

According to the official pharmacokinetics data, the active ingredient mesterolone is highly bound to serum proteins. Specifically, approximately 58% of it is bound to Sex Hormone Binding Globulin (SHBG).

Q: Can Provimest be used to treat symptoms of 'andropause'?

Provimest is indicated for deficient endogenous androgen formation, which may cover the clinical picture of declining physical and mental activity in middle- and old-aged men. Symptoms may include a reduction in efficiency, disturbances of libido and potency, and mood changes.

Q: Why is Provimest sometimes mentioned in bodybuilding or performance-enhancing discussions?

The medicine is classified as an anabolic androgen. Regulatory documents explicitly restrict its use for enhancing muscle development or physical capacity in healthy individuals because its abuse is associated with serious cardiovascular and hepatic health risks.

Q: Does Provimest improve muscle strength or power?

Regulatory documents explicitly restrict its use for enhancing muscle development or physical capacity in healthy individuals. Its purpose is clinical supplementation for hormonal deficiency, not performance enhancement.

Q: Can Provimest increase my blood pressure?

Official warnings advise caution for patients with severe cardiovascular disease. Official warnings indicate that patients with pre-existing high blood pressure should be monitored closely, as blood pressure may be affected by the drug.

Q: Why might a doctor prefer to prescribe Provimest over another androgen for hypogonadism?

Provimest possesses a unique characteristic as an androgen: it is structurally non-aromatizable. This means it cannot be converted into estrogen (female hormones) in the body, which can be a differentiating factor in therapeutic choice for male hormonal insufficiency.

Q: Are there any known interactions between Provimest and blood thinning medications?

Yes, Provimest can interact with blood thinning medications (oral anticoagulants), such as warfarin, by increasing their effect. This interaction can raise the risk of bleeding, requiring the close and frequent monitoring of blood clotting parameters.

Q: Can Provimest be taken by men who have diabetes?

Yes, but caution is advised. Provimest may increase the blood-sugar-lowering effect of insulin and other antidiabetic drugs. Patients with diabetes should have their blood glucose levels carefully monitored to address the risk of hypoglycemia (low blood sugar).

Q: Does Provimest affect cholesterol levels or heart health?

Caution is advised for patients with severe cardiovascular disease. While effects on cholesterol are not always specified in the main side effect list, hormonal medicines may impact heart health parameters, and the need for monitoring is based on a patient’s cardiovascular risk profile.

Q: What are the concerns about taking Provimest if someone has a history of liver problems?

Provimest is strictly contraindicated for use in patients with a history of, or currently existing, liver tumours (hepatic tumours). This is due to a documented risk associated with hormonal substances.

Q: Does taking Provimest require regular blood tests or lab work?

Yes, regulatory guidelines specify that regular monitoring and lab work are necessary for safe use. This includes mandatory regular examination of the prostate gland and frequent monitoring of blood clotting parameters and blood glucose levels when taken with certain other medications.

Q: What level of research evidence supports the use of Provimest for oligozoospermia?

The drug’s documented therapeutic role in deficient androgen formation supports its use in male infertility. This is often managed in defined treatment cycles to support spermatogenesis, as outlined in official information.

Q: Does Provimest interact with common over-the-counter pain relievers or supplements?

Official interaction profiles only highlight mandatory warnings for oral anticoagulants, antidiabetic agents, and cyclosporine. No specific interactions with common over-the-counter pain relievers or general supplements are listed in the required procedural constraints.

Q: How does the mechanism of action for Provimest differ from other androgens?

A defining feature of Provimest's active ingredient is that it is structurally non-aromatizable. This means it cannot be converted into estrogen (female hormones) within the body, which can be a key distinguishing factor in its pharmacological action compared to some other androgens.

Q: Is it true that Provimest is considered less liver-toxic than some other oral steroids?

While the medicine is an oral steroid, official regulatory documents document the potential risk of benign and, rarely, malignant liver tumours. All oral hormonal substances carry potential liver-related risks, and monitoring by a healthcare professional is necessary.

How should Provimest be stored and disposed of?

How to Store and Dispose of Provimest (Mesterolone Tablet)

Provimest must be stored according to strict regulatory conditions to ensure stability and safety. The tablets must be stored below 30 C in a cool and dry place, protected from direct sunlight and excess moisture. To prevent degradation, the medicine should not be kept in damp locations like a bathroom or a hot car.

Packaging and Child Safety

It is mandatory to keep Provimest out of the sight and reach of children and store the tablets in their original pack until they are needed. Do not use the medicine past the expiration date printed on the packaging.

Disposal Instructions

Expired or unused Provimest should not be flushed down the toilet or thrown into wastewater. Official guidance recommends returning the unused medicine to a pharmacist or utilizing a community drug take-back program. Disposal must comply with local environmental regulations.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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