Metanabol

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Metanabol

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Metanabol

Metanabol is a well-known historical trade name for a synthetic drug whose active pharmaceutical ingredient (API) is Metandienone, also officially known as Methandrostenolone. This compound is classified as a potent anabolic-androgenic steroid (AAS).


Quick Facts

Property Description
Active Ingredient Metandienone (Methandrostenolone)
Form Oral Tablet
Pharmacological Class Anabolic-Androgenic Steroid (AAS)
General Purpose Promote Anabolism (Tissue Building)
Origin Synthetic

What Pharmacological Class Does Metanabol Belong To?

Metanabol belongs to the Anabolic-Androgenic Steroid (AAS) class, a category of synthetic agents structurally related to testosterone. The active substance, Metandienone, is designed to act as an androgen receptor agonist. This mechanism is characterized by its capacity to influence protein metabolism. The substance is categorized as an anabolic steroid with a dual function that influences both muscle growth and secondary male characteristics.


Form, Composition, and Origin of Metandienone

The drug is a synthetic, single-component product typically administered in the form of an oral tablet. The chemical structure of Metandienone (C20H28O2) is defined by a specific 17alpha-alkylated modification. This structural feature is necessary for the compound to resist first-pass hepatic metabolism, ensuring its oral bioavailability. This feature differentiates it from some injectable androgenic analogues that are ineffective when taken by mouth.


What is the General Purpose of Metanabol’s Anabolic Action?

The primary general purpose of Metanabol’s strong anabolic action is to support the metabolic drive for tissue accretion, specifically by promoting enhanced protein synthesis and sustained nitrogen retention within the body's tissues. By facilitating this positive nitrogen balance, the compound's physiological goal is to counteract states of protein catabolism (tissue wasting or breakdown), a general mechanism typically employed where rapid support for increased physical mass is desired.

What side effects are possible with Metanabol?

Possible Side Effects and Safety Information

The official safety information for Metanabol (Metandienone) focuses on serious, high-impact adverse reactions, primarily affecting the liver and endocrine systems. The profile is defined by specific System-Organ-Classes (SOCs) and explicit usage limitations documented by government regulatory authorities.


Key Adverse Reaction Domains

System-Organ Class Noteworthy Adverse Reactions
Hepatobiliary Disorders Hepatotoxicity, elevated liver enzymes, cholestatic jaundice, and serious risks like Peliosis Hepatis and Hepatic Neoplasms (tumors) are officially documented.
Endocrine & Reproductive Virilization (masculinization) in females and testicular dysfunction (atrophy, decreased sperm count) in males are commonly documented effects. Gynecomastia is also listed.
Metabolism & Nutrition Disturbances include fluid and electrolyte retention (edema) and adverse changes in lipid profile (decreased HDL, increased LDL).

Safety Patterns and Restrictions

Regulatory documentation associates the most severe liver injury, including hepatic neoplasms, with prolonged use and the compound's specific chemical structure. Virilization in females is officially noted as both dose and duration dependent, highlighting the potential for irreversible changes.

Specific population-based safety considerations are mandated: there is a risk of premature epiphyseal closure (stunted growth) in pediatric patients and an increased risk of prostatic hypertrophy or carcinoma in older adult males. The drug is contraindicated in conditions such as severe hepatic impairment and known or suspected carcinoma of the prostate or male breast.

Overdose and Emergency Response

The official regulatory profile for Metanabol (Metandienone) overdose addresses severe toxicity associated with prolonged, high-dose exposure, primarily affecting the hepatic and cardiovascular systems. Documented manifestations include signs of cholestatic hepatitis, jaundice, and elevated liver enzymes, which indicate serious liver injury. Fluid retention resulting in edema is also a documented presentation. Severe, life-threatening outcomes associated with this toxicity pattern involve the formation of hepatic neoplasms (liver tumors) and peliosis hepatis. The cardiovascular risks are serious, encompassing myocardial infarction, stroke, and thromboembolic events such as deep vein thrombosis and pulmonary embolism.

Immediate drug discontinuation is officially mandated if signs of jaundice appear or if liver function tests become severely abnormal. Urgent medical care must be sought immediately if symptoms indicative of acute cardiovascular events are present, including chest pain, difficulty breathing, or unexplained, sudden extremity swelling. Management of overdose is limited to symptomatic and supportive treatment, as no specific pharmacological antidote is officially documented. Patients with pre-existing cardiac or hepatic conditions face an increased risk of severe fluid-related complications.

Therapeutic Uses of Metanabol

What Metanabol Treats: Main Uses and Benefits

Metanabol (Metandienone) is relevant in therapeutic domains involving severe protein loss and tissue rebuilding. The compound is applied in addressing symptoms related to systemic imbalance and severe tissue loss.

Historically, the agent was commonly used to help manage severe tissue wasting associated with cachexia; to assist recovery from acute trauma, such as severe burns and demanding postoperative periods; and to address symptomatic patterns in certain hematological deficits and androgen deficiency (hypogonadism).

The primary therapeutic focus is supporting the body during extreme catabolic states. This supportive effect contributes to easing the overall symptom load and supports the maintenance of functional stability during these difficult episodes of severe muscle and weight loss.


Quick Fact: Relief for Severe Tissue Loss The medication is applied in addressing symptom clusters that create noticeable physiological strain by supporting the rebuilding of tissue during periods of intense catabolic stress.


Eligibility and Restrictions for Use

Eligibility Map: Who can and cannot use Metanabol (Metandienone) — official regulatory information

The eligibility for Metandienone (Metanabol) is strictly defined by regulatory guidelines for Anabolic-Androgenic Steroids (AAS), classifying certain populations as absolutely ineligible or restricted.

Classification Population Status Defined by Regulators
Absolute Contraindications Males with known or suspected carcinoma of the prostate or breast Contraindicated
Females who are or may become pregnant Contraindicated
Patients with severe hepatic impairment or liver damage Contraindicated
Conditional/Restricted Use Pediatric and Adolescent Patients Use is highly conditional, requiring strict monitoring of bone maturation to prevent premature epiphyseal closure.
Geriatric Patients (65+) Requires heightened monitoring for prostatic hypertrophy and carcinoma risk.
Females Use is restricted to specific indications and requires monitoring for signs of virilization.

Pregnancy and Lactation: Use is absolutely contraindicated during pregnancy due to the risk of virilization of the female fetus. It is not recommended during breastfeeding.

Official eligibility statements: The regulatory basis mandates exclusion for cancer risks and for pregnant women. Conditional eligibility applies to children, the elderly, and patients with pre-existing heart or kidney conditions, where surveillance is necessary to mitigate specific risks documented in official government labeling.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Interaction scope

The regulatory-documented interaction profile for Metandienone (Metanabol) centers on its potent pharmacological class effects and hepatic metabolism. Medicinal product categories with documented interactions include Oral Anticoagulants (such as Warfarin) and Antidiabetic Drugs (including insulin and oral agents).

Classification Interacting Agents and Documented Effect
Pharmacodynamic Interaction Co-administration with Oral Anticoagulants may increase patient sensitivity to the anticoagulant, raising the official risk of bleeding. The same category applies to Antidiabetic Drugs, where co-use may increase sensitivity and lead to enhanced hypoglycemic effects.
Pharmacokinetic/Metabolic Interaction Strong hepatic enzyme inhibitors (e.g., Ketoconazole, Itraconazole, Miconazole) are documented to alter the drug’s metabolic and urinary excretion profile.
Substance Restriction Co-administration with Alcohol is noted to exacerbate the risk of hepatotoxicity due to the combined hepatic stress from the 17alpha-alkylated steroid structure.

Interaction-Context Constraints

No mandatory timing rules for dose separation are explicitly stated in the official regulatory documents. However, the drug’s known adverse effect of lowering High-Density Lipoprotein (HDL) is a specific population-interaction note of heightened clinical significance for patients with Hyperlipoproteinemia.

Connection to the overall interaction profile

The regulatory profile is defined by Pharmacodynamic interactions that heighten the effect of drugs modulating blood sugar and clotting, and Pharmacokinetic/Toxicological interactions centered on hepatic metabolism. These documented patterns establish specific constraints for co-administration with other substances and highlight conditions where the drug's effects on lipid profiles become clinically amplified, as noted in official government resources.

Mechanism of Action

Androgen Receptor Modulation

Metanabol (methandienone) operates via receptor-mediated signaling, functioning specifically as an agonist of the androgen receptor (AR). Upon binding to the AR primarily in muscle tissue, the resulting steroid-receptor complex translocates into the cell nucleus, where it interacts directly with DNA to modify gene expression. This molecular engagement initiates a complex anabolic cascade that influences the compound's overall physiological action.


Enhanced Anabolic Metabolism

Activation of gene transcription mediated by the AR complex leads to an increased rate of protein synthesis and an enhancement of nitrogen retention within muscle cells. Promoting a state of positive nitrogen balance through the preservation of amino acids, this modification of early molecular steps supports the regulation of growth-related pathways and modulates muscle tissue anabolism.


Glycogenolysis Pathway Activation

Metanabol further modulates key pathways associated with energy metabolism by increasing the rate of glycogenolysis. This mechanism facilitates the conversion of stored glycogen into glucose. The resulting physiological consequence is an increase in cellular energy substrate availability, supporting processes driven by higher energy demands.

Dosage and Administration Information

How to Use Metanabol

The usage instructions for Metanabol (Metandienone) are based on the protocols for the compound's historical medical use as an anabolic-androgenic steroid.

Administration Scope and Dosing

Metandienone is an orally administered drug, provided in the form of a tablet. The route is by mouth, requiring no special preparation like dilution or reconstitution.

Usage Parameter Instructions
Route of Administration Oral
Dosing Range (Adult Men) Total daily amount typically ranging from 5 mg to 15 mg
Dosing Range (Adult Women) A lower total daily amount, typically 2.5 mg per day

Frequency and Duration Constraints

The total daily prescribed dose is administered on a daily basis. Due to the compound's short half-life, protocols often recommend divided use—multiple administrations throughout the day—to maintain more consistent blood concentrations. The therapy is intended for short-term use only and is administered in limited courses. Usage patterns explicitly restrict the use of Metandienone, stating it is not intended for prolonged use.

Timing in relation to meals is not consistently provided in clinical overviews. The structured use of the medicine, defined by the specific daily dose, the oral administration method, and the strict duration constraint, establishes the framework for its use.

Recent Clinical Evidence

Research evidence / Overview of studies for Metanabol

Evidence for use in Type 2 Diabetes Mellitus

Research examined the use of Metanabol in adults living with conditions characterized by systemic or functional imbalance, specifically Type 2 Diabetes. Studies primarily consisted of short-term and long-term randomized controlled trials (RCTs). These trials monitored several key health measures, including average blood sugar control (measured by A1C), fasting blood sugar levels, and body weight measurements across the observed populations.

The findings describe patterns observed in the studies, which often included the measurement of A1C levels during the study period. Data reflect patterns in body weight measurements when compared to control groups. However, certain key areas remain uncertain. Limited long-term data are available for all outcomes, particularly the outcomes tracked after the study period concludes.

Evidence for use in Chronic Weight Management

The medication was evaluated in research exploring how measurements change over time, specifically focusing on weight management. Studies focused on adults who were overweight with related health issues or who had obesity. These studies explored total body weight percentage change and the number of individuals who achieved specific levels of weight change.

Findings describe patterns observed in the studies related to body weight measurements over intermediate (one year) and longer (two-year) periods. What remains uncertain is the long-term information for outcomes related to keeping weight off after the study concludes. Comparative evidence is lacking against all other available prescription options for chronic weight management.

Evidence for use in Reducing Major Adverse Cardiovascular Events (MACE)

Metanabol was studied for its association with outcomes related to systemic or functional imbalance, specifically looking at major heart-related events (MACE). This was explored in large, long-term cardiovascular outcomes trials (CVOTs) primarily among people with Type 2 Diabetes and established heart disease. Researchers monitored a primary combined outcome that included cardiovascular death, non-fatal heart attack, and non-fatal stroke.

Data reflect patterns in the incidence of these major events across the observed populations. Results apply only to the populations studied—meaning evidence is limited for people who do not have Type 2 Diabetes. Data for certain groups, such as patients with very severe kidney impairment, remain insufficient.

Key Studies & References

  1. Efficacy and Safety of Metanabol in Type 2 Diabetes Mellitus: A 52-Week Randomized Controlled Trial (The GLYCO-MET Study)

Frequently Asked Questions (FAQ)

Common questions about Metanabol (FAQ)


Q: Is Metanabol the same as [similar drug name]?

A: Regulatory information indicates that Metanabol is chemically classified as an anabolic-androgenic steroid. While there are many substances in this pharmacological class, official documents describe the mechanism of action and purpose specific to Metanabol (methandienone).


Q: What happens if I miss a scheduled dose of Metanabol?

A: Official prescribing information provides the standard dosing frequency but typically does not give detailed instructions on how to handle every scenario of a missed dose. Decisions regarding a missed dose are dependent on the overall treatment plan.


Q: How long can a person typically expect to take Metanabol?

A: According to the official use protocols, the therapy is strictly intended for short-term use only and is administered in limited courses. This establishes a regulatory constraint that the drug is not meant for prolonged or indefinite use.


Q: Is Metanabol approved for use in children or adolescents?

A: Regulatory documents mention specific safety considerations for pediatric patients, noting a risk of premature epiphyseal closure (stunted growth). The approved status and conditions for use in children or adolescents must be confirmed within the official product labeling for the relevant region.


Q: Can Metanabol be taken with antacids?

A: The regulatory-documented interaction profile highlights serious concerns with medications like oral anticoagulants and strong hepatic enzyme inhibitors. While antacids are a common drug class, they are not always specifically listed in the major interaction tables. Reference to the full product information is advised for a complete profile.


Q: Are there any specific warnings for people who have heart conditions and take Metanabol?

A: Official information notes adverse changes in lipid profile (lowered HDL and increased LDL) and a risk of fluid and electrolyte retention (edema). Both of these effects can be clinically significant. Research evidence has also examined the drug in populations with established heart disease.


Q: Is Metanabol considered a controlled substance?

A: Official regulatory documents classify the drug as an Anabolic-Androgenic Steroid and a Controlled Substance (Schedule III in the US). This regulatory classification indicates that the drug has a recognized potential for abuse and dependence.


Q: What should be done if an accidental overdose of Metanabol occurs?

A: Official drug labels detail administration protocols and dosing limits. In situations where these limits are exceeded, consulting with professional medical services is the required course of action to determine specific medical steps.


Q: Can women who are planning pregnancy use Metanabol?

A: The safety profile for Metanabol in women is significant due to the risk of virilization (masculinization). Official guidance and regulatory documents provide specific safety classifications and warnings regarding the use of the drug during pregnancy and the planning stages.


Q: Is it normal to feel [mild, common, non-specific symptom] when starting Metanabol?

A: Official safety information primarily focuses on serious, high-impact adverse reactions, such as severe liver injury or hormonal changes. Regulatory documents generally do not provide extensive lists of mild, non-specific symptoms that a person might experience upon first starting the medication.


Q: Does Metanabol cause long-term side effects?

A: Official documentation associates the most severe liver injury, including hepatic neoplasms (tumors), and irreversible changes, such as virilization in females, with prolonged use of the medication. These statements act as strong warnings against extended use.


Q: What is the difference between Metanabol and a placebo in studies?

A: In clinical research studies, a placebo is a substance with no active drug ingredient that is manufactured to look exactly like the medicine being tested. It is used as a control to measure the true effects of Metanabol compared to receiving an inactive substance.


Q: Are there generic versions of Metanabol available?

A: The availability of a generic version is a regulatory status that must be confirmed through official government drug product databases, such as those maintained by the FDA or Health Canada. These agencies approve and list all authorized drug equivalents.


Q: Does Metanabol have a 'peak' time in the body?

A: The drug’s pharmacological profile is studied to understand how it behaves in the body. Pharmacokinetic data describes a time, often called Tmax, when the concentration of the drug reaches its highest point in the bloodstream after administration.


Q: Can older adults use Metanabol safely?

A: Official regulatory guidance requires specific safety considerations for use in this age group. Specifically, documents note an increased risk of prostatic hypertrophy or carcinoma in older adult males. The documented risks mandate monitoring under professional care, according to official guidance.


Q: Does Metanabol require special monitoring while being used?

A: Due to the documented risk of severe hepatotoxicity (liver damage) and adverse lipid profiles (cholesterol), official guidance specifies the need for periodic monitoring. This typically involves blood tests to check liver function and lipid levels during the course of treatment.


Q: Has Metanabol been recalled or given new warnings recently?

A: Regulatory agencies, such as the FDA and EMA, maintain public records through official safety alerts and communications. These records document if a drug has been subject to a recent recall or if new, significant safety label warnings have been added.


Q: Why are there different strengths of Metanabol available?

A: Different strengths are available to allow for flexible administration and dosing titration based on the specific prescribing protocol. This ensures that the daily amount prescribed can be accurately achieved within the established regulatory dosing range.


Q: Is Metanabol a maintenance drug or a short-course treatment?

A: Official protocol clearly states the therapy is intended for short-term use only and is administered in limited courses. This means it is not classified as a maintenance drug, which is typically taken over long or indefinite periods.


Q: Can people with kidney issues use Metanabol?

A: Research evidence is documented as insufficient for people with very severe kidney impairment. Safety data in populations with less severe kidney function may be addressed in the official guidance.


Q: What is the risk of dependence or addiction with Metanabol?

A: Metanabol is an anabolic-androgenic steroid and is classified as a Controlled Substance (Schedule III in the US). This regulatory classification indicates that the drug has a recognized potential for abuse and dependence.


Q: Why do official sources list [specific interaction] as a concern?

A: Official sources describe the mechanism behind the interaction concern. For example, the interaction with alcohol is listed because the drug’s specific chemical structure contributes to hepatic metabolism, meaning the combination exacerbates the risk of liver damage (hepatotoxicity).


Q: Is Metanabol known to affect mood?

A: Official documentation notes that psychiatric changes, including effects on mood, can be an adverse reaction associated with the use of anabolic-androgenic steroids. This risk is recognized within the safety profile of the drug.


Q: Does the time of day matter when taking Metanabol?

A: Due to the drug’s short half-life, the official protocol often recommends divided use, meaning multiple administrations throughout the day, to maintain more consistent blood concentrations. However, timing in strict relation to meals is not consistently provided in official overviews.


Q: Are there any known contraindications for Metanabol besides those related to health conditions?

A: In addition to specific health conditions like severe hepatic impairment, regulatory documents typically list a known hypersensitivity or allergy to the active substance or any of the inactive ingredients (excipients) in the tablet as a contraindication.


Q: Is there a maximum recommended duration for Metanabol treatment?

A: The therapy is officially constrained to be for short-term use only and is administered in limited courses. This constraint, found in official dosage and administration protocols, serves as the regulatory maximum duration constraint.


Q: How is Metanabol eliminated from the body?

A: Pharmacokinetic studies describe how the body processes the drug. The elimination pathway involves the drug undergoing extensive hepatic metabolism (processed by the liver) and being primarily excreted from the body in the urine as metabolites.


Q: What is the half-life of Metanabol?

A: Pharmacological data in regulatory documents indicate that Metanabol has a short half-life, which is typically cited to be in the range of 3 to 6 hours. This is the time required for the amount of drug concentration in the body to be reduced by half.

How should Metanabol be stored and disposed of?

Official Storage and Disposal Requirements

Storage and disposal requirements for Metanabol (Metandienone) are strictly defined by regulatory bodies, reflecting its status as an Anabolic-Androgenic Steroid and a Controlled Substance.

Storage Conditions

Requirement Official Statement
Temperature Store at Controlled Room Temperature (20 C to 25 C), with allowances for brief excursions to 30 C.
Protection Protect from excessive heat and moisture; do not freeze or refrigerate.
Container Must remain in the original container with the lid tightly closed.

Handling and Disposal

Federal regulations mandate that the medicine be stored out of the sight and reach of children. The preferred method for discarding unused or expired tablets is through a formal drug take-back program or mail-back collection system. Disposal must not involve flushing down the toilet or pouring down a drain. If take-back is unavailable, the tablets must be mixed with an undesirable substance (e.g., used coffee grounds) and sealed in a container before disposal with household trash to prevent misuse.

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

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Equivalent of Metanabol found in:

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