Methyltestosterone

Quick links to important sections

Methyltestosterone

Selected form

Medically reviewed

Marina Burgos

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 Methyltestosterone

Quick Facts

Property Description
Active ingredient Methyltestosterone (17alpha-Methyltestosterone)
Form Oral tablets, Buccal tablets, Capsules
Pharmacological class Androgen, Anabolic Steroid
Common use Hormone replacement/supplementation
Origin Synthetic, C17-alkylated derivative

What Type of Medicine is Methyltestosterone? (Identity and Classification)

Methyltestosterone is a highly potent, synthetic hormonal agent that is clinically recognized as both an androgen and an anabolic steroid. It functions as the active ingredient in medications that chemically mimic the actions of natural testosterone. The essential, differentiating feature of this drug is its origin as a C17-alkylated derivative of testosterone. This critical structural modification allows the active ingredient, 17alpha-Methyltestosterone, to be reliably absorbed when taken by mouth, granting it oral bioavailability. This property means it represents a specific class of orally active androgens, distinguishing it from forms that require injection or topical application.

Composition and Available Forms (Pharmaceutical Presentation)

This medication is consistently supplied as a single-ingredient product in solid dosage forms, including oral tablets, buccal tablets, and capsules. The drug's composition consists solely of the active substance, Methyltestosterone, combined with necessary pharmaceutical excipients. These various dosage forms facilitate the permitted routes of administration—oral ingestion or buccal absorption—making it a convenient option for patients requiring continuous hormonal therapy.

What is the General Purpose of This Hormone? (High-Level Benefit)

The primary therapeutic function of Methyltestosterone is to replace or supplement the body's natural levels of testosterone, commonly used in cases of documented male hormone deficiency. It functions by acting as an androgen receptor agonist, thereby promoting the essential hormonal signals required for maintaining proper physiological function. The clinical consensus is that this action supports tissue building (anabolism) and maintains male secondary sexual characteristics, directly addressing the core symptoms of hormone insufficiency.

Regulatory References

  1. Methyltestosterone DailyMed Drug Information

What side effects are possible with Methyltestosterone?

Possible side effects and safety information

The safety profile of Methyltestosterone is fundamentally shaped by its classification as a C17-alkylated androgen and its systemic hormonal action, necessitating specific safety monitoring.


Officially Documented Adverse Reactions

Adverse reactions are officially grouped by System-Organ-Class (SOC) in regulatory documents, with key concerns including Hepatobiliary Disorders (liver function), Endocrine/Metabolism Disorders, and Reproductive System effects.

Classification Examples of Documented Effects
Common Gynecomastia, fluid retention (Edema), increased frequency of erections, Acne.
Rare/Serious Peliosis Hepatis, Hepatic Neoplasms (Liver Cancer), Venous Thromboembolic Events (blood clots).

Serious hepatotoxicity, including Peliosis Hepatis and Hepatocellular Carcinoma, is specifically associated with prolonged use of this class of drug, as documented in regulatory labeling. The drug may also cause or exacerbate edema, a risk that requires caution in patients with pre-existing cardiac, renal, or hepatic disease.


Safety Considerations for Specific Populations

Official labeling defines specific safety constraints for certain groups:

  • Pediatric Males: The drug carries the risk of premature epiphyseal closure (stunted growth) due to accelerated bone maturation, requiring periodic monitoring of bone age.
  • Older Adults (Geriatric): Use is associated with an increased risk for the development or worsening of Benign Prostatic Hyperplasia (BPH) and potential risk of Prostate Carcinoma.
  • Female Patients: The risk of irreversible virilization (masculinization, such as deepening voice and clitoral enlargement) is documented, and women who are or may become pregnant are contraindicated due to the risk of fetal harm.

Use is also contraindicated in men with known or suspected breast or prostate carcinoma, and periodic monitoring of liver function tests and hematocrit is required.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory profile for Methyltestosterone overdose outlines specific clinical manifestations and mandates required emergency actions. Acute overdosage may be associated with non-specific gastrointestinal disturbances, including nausea and vomiting. The most severe outcomes, however, are typically linked to prolonged use of high doses over time, rather than a single acute event.


Documented Risks and Emergency Actions

Feature Official Regulatory Statement
Manifestations Nausea, gastrointestinal upset, exaggeration of androgenic effects (e.g., virilization in females).
Serious Outcomes Peliosis hepatis and severe fluid and electrolyte imbalance, potentially leading to congestive heart failure.
Emergency Action Required Seek immediate medical attention for suspected overdose, severe complications, or signs of behavioral change signaling abuse.

Management and Monitoring

Management of Methyltestosterone overdose is focused strictly on symptomatic and supportive treatment, as regulatory documents confirm that no specific antidote is known. Procedures may include clinical observation and monitoring of vital functions, with specific attention given to fluid and electrolyte status due to the potential for sodium and water retention. Patients must discontinue the drug and receive urgent medical care upon the suspected onset of life-threatening symptoms or complications.

Therapeutic Uses of Methyltestosterone

What Methyltestosterone Treats: Main Uses and Benefits


Methyltestosterone is commonly used to help with the severe absence or marked deficiency of natural testosterone in males with hypogonadism. The core therapeutic area is androgen replacement therapy, which plays a role in managing the development and maintenance of male secondary sexual characteristics. This treatment is relevant in contexts involving heightened systemic burden, generally supporting tissue building, which may assist with managing the functional fatigue associated with hormone lack.

The medication's applications are generally focused on endocrinological deficits, and it is commonly used to help with male hypogonadism, delayed puberty in specific adolescent males, and as a palliative therapy for advancing inoperable metastatic mammary carcinoma in select postmenopausal women. The medication may assist with managing symptoms that create noticeable physiological strain, and provides support that helps ease the overall symptom burden.

Quick Fact: Relief for Androgen Deficiency

This medication is typically applied when supportive symptom management is appropriate for conditions characterized by systemic imbalance, and contributes to maintaining functional stability by addressing symptom clusters related to functional strain.

Eligibility and Restrictions for Use

Methyltestosterone eligibility is strictly defined by regulatory authorities based on population and existing health status. The medication is contraindicated (absolutely prohibited) for several groups, including men with known or suspected carcinoma of the prostate or carcinoma of the breast. It is also contraindicated for women who are pregnant or may become pregnant, due to the high risk of fetal virilization, and for patients with a known hypersensitivity to the ingredients.

Use is restricted and requires caution in patients with certain pre-existing conditions. Individuals with cardiac, renal, or hepatic disease should use the medication with caution due to the risk of edema. Patients with Benign Prostatic Hyperplasia (BPH) require close monitoring for the worsening of symptoms. Furthermore, the official label states that the drug must be discontinued in cancer patients who develop hypercalcemia.

Regarding age, use in prepubertal males for delayed puberty requires mandatory, periodic monitoring of bone age to assess the risk of compromised adult stature. Safety and efficacy have not been established for males under 18 years old or for the treatment of age-related hypogonadism.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile of Methyltestosterone is defined by its androgenic activity, which results in documented pharmacodynamic effects on specific co-administered drug classes, as stated in regulatory labeling.


Drug–Drug Interactions with Modified Effects

The administration of Methyltestosterone with oral anticoagulants, such as warfarin, is officially documented to increase the anticoagulant's activity. This is due to the suppression of specific clotting factors, necessitating more frequent monitoring of the International Normalized Ratio (INR) and prothrombin time.

Co-administration with antidiabetic agents, including insulin, may result in decreased blood glucose levels. This effect can lead to a reduced dosage requirement for the co-administered antidiabetic medicine.

Combined use with corticosteroids or ACTH is formally associated with an increased risk of fluid retention (edema). This interaction requires specific caution in patient populations with underlying cardiac, renal, or hepatic disease.


Official Interaction Constraints

The official regulatory labeling does not identify specific enzyme-mediated pharmacokinetic interactions, nor does it mandate timing or separation requirements for administration. Formal restrictions are instead procedural, requiring increased laboratory monitoring for certain combination therapies.

Mechanism of Action

Methyltestosterone functions as a synthetic androgen receptor (AR) agonist. Following systemic absorption, it selectively targets and enters androgen-responsive cells. Inside the cell, methyltestosterone, or its active metabolite, binds with high affinity to the intracellular androgen receptor located in the cytoplasm or nucleus. This ligand-receptor binding event induces a conformational change in the AR, causing dissociation from chaperone proteins and translocation of the activated complex into the nucleus, if not already present. Once in the nucleus, the AR-ligand complex dimerizes and binds to specific DNA sequences known as androgen response elements (AREs) in the promoter regions of target genes. This binding initiates the recruitment of co-activator proteins and modulates gene transcription, resulting in altered messenger RNA (mRNA) and subsequent changes in the synthesis rate of specific structural and enzymatic proteins. This cascade of molecular events mediates the characteristic system-level physiological modulation of androgenic effects, including the influence on protein anabolism, nitrogen balance, and the development and maintenance of primary and secondary male characteristics.

Dosage and Administration Information

Methyltestosterone is administered daily, typically using either the oral route (as a capsule or tablet) or the buccal route (via a specialized tablet absorbed through the oral mucosa). The choice of administration route influences the dose due to the buccal route's greater androgenic activity, meaning buccal doses are approximately half the strength of corresponding oral doses.


Official Administration Guidelines

Administration is characterized by strict individualization, with the exact dose tailored to the specific condition being managed and the patient's response. Daily requirements are frequently best administered in divided doses for consistent exposure.


Dosing Ranges and Duration

Indication Administration Route Typical Daily Range Duration Pattern
Male Hypogonadism Oral 10 mg to 50 mg Long-term maintenance
Palliative Breast Carcinoma Oral 50 mg to 200 mg Adjusted based on clinical need

Population-Specific Use Rules

For the treatment of delayed puberty in adolescent males, the duration of therapy is officially limited to 4 to 6 months. Usage in prepubertal patients requires mandatory procedural constraint: radiographic examination of the hand and wrist must be performed at 6-month intervals to monitor for accelerated bone maturation. Prior to starting therapy for male hypogonadism, the condition must be confirmed by serum testosterone concentrations measured in the morning on at least two separate days.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Methyltestosterone


Evidence for Use in Male Hypogonadism (Testosterone Deficiency)

Research primarily focuses on this use in adult males diagnosed with hypogonadism using Randomized Controlled Trials (RCTs) and systematic reviews. Studies monitored serum testosterone concentrations and changes in sexual desire, as well as outcomes related to bone mineral density. Findings describe patterns where testosterone levels were measured evolving toward the target range during the study period. However, research highlights changes measured for outcomes related to physical function or energy levels, where findings were mixed and inconsistent across available studies. Follow-up durations were often limited to the short-term to intermediate-term.


Evidence for Use in Delayed Puberty in Adolescent Males

Research examined this use in adolescent males with documented delayed sexual development, relying on smaller Clinical Trials and historical clinical experience. Studies monitored the evolution of pubertal changes and the development of secondary sex characteristics, with a key outcome being bone maturation and monitoring potential risks. The evidence for this use relies on older study designs with modest sample sizes and lacks the volume of large-scale, modern RCTs seen for adult indications.


Research on Palliative Use in Postmenopausal Breast Cancer

The evidence for research on palliative therapy for advancing inoperable metastatic mammary carcinoma is primarily drawn from Older Clinical Studies and Historical Data. Studies explored outcomes related to anti-neoplastic effects and the palliation of symptoms. Older studies described patterns of effect but also highlighted common occurrences of androgenic side effects. This data is historic and does not reflect current clinical practice for breast cancer.


Study Duration and Remaining Uncertainties

The typical follow-up durations for primary efficacy studies were often short-term or intermediate-term. Long-term effects are not fully established, and the research exploring sustained outcomes is ongoing. Comparative evidence is lacking in large-scale studies against other available testosterone delivery systems. Data for certain groups remain insufficient, particularly for effects in older adults or those with specific underlying comorbid conditions.

Frequently Asked Questions (FAQ)

Common questions about Methyltestosterone (FAQ)

Q: Is Methyltestosterone the same as testosterone shots?

Methyltestosterone is a synthetic androgen available for oral administration (swallowed as a capsule or tablet) or buccal absorption (dissolved between the cheek and gum). This differs from other forms of testosterone replacement, such as injectable (shots) or topical formulations. The official product information specifies its administration as an orally or buccally active androgen.

Q: Is it normal to feel moody when taking Methyltestosterone?

Regulatory documents list anxiety and depression among the documented adverse reactions related to the nervous system. These side effects indicate the potential for changes in mood with the use of the medicine. Significant or unusual changes in mood should be discussed with a healthcare provider.

Q: Are there specific foods or drinks to avoid while using Methyltestosterone?

Official guidelines indicate that this medication may be taken with or without food. Regulatory labeling for this product does not specify mandatory restrictions on particular foods or drinks that must be avoided during therapy.

Q: Does Methyltestosterone interact with herbal supplements?

Regulatory documents recommend transparency regarding all concomitant therapy, including over-the-counter drugs and herbal supplements, with the prescribing healthcare provider. This is advised due to the potential for unstudied interactions, as only certain drug-drug interactions are formally documented.

Q: Does Methyltestosterone need to be taken at a specific time of day?

Official administration guidelines state that the total daily requirement is frequently administered in divided doses throughout the day to help maintain consistent hormonal exposure. However, the official documentation does not mandate a specific time of day for administration.

Q: How quickly does Methyltestosterone affect sleep patterns?

Regulatory documents for this drug class mention a potential risk of sleep apnea in patients receiving testosterone products, which can affect sleep. The official labeling does not specify the timeline for when changes to sleep patterns, if they occur, might begin, indicating this information is not fully documented.

Q: What is the maximum duration of use described in official labeling?

The official duration of therapy varies by indication. While use for male hypogonadism is often described as long-term maintenance, the therapy for delayed puberty in adolescent males is specifically limited to four to six months. The determination of the appropriate duration is made by a healthcare provider based on the condition being treated.

Q: What are the most commonly reported side effects of Methyltestosterone?

According to official documentation, commonly reported side effects for adult males include gynecomastia (enlargement of breast tissue) and excessive frequency or duration of penile erections. In female patients, the most common effects are related to virilization (masculine changes).

Q: Does Methyltestosterone cause water retention or bloating?

Yes, official labeling documents that the drug can cause the retention of sodium, chloride, and water, resulting in the documented side effect of edema (swelling or fluid retention). This risk of fluid retention requires caution in patient populations with underlying cardiac, renal, or hepatic disease, as noted in official labeling.

Q: Is Methyltestosterone safe for older men?

Official documents note that geriatric (older) patients may be at an increased risk for the development or worsening of Benign Prostatic Hyperplasia (BPH) and are associated with a potential risk of prostate carcinoma. Due to these risks, periodic and specific medical monitoring is required when the drug is used in geriatric patients, according to regulatory guidelines.

Q: Does Methyltestosterone interact with medicines for anxiety or depression?

While the official labeling does not list all anxiety or depression medications, it lists anxiety and depression as potential adverse reactions affecting the nervous system. Official guidance includes an advisory for consulting with a healthcare provider about all medicines being taken.

Q: Is Methyltestosterone available over the counter?

No, Methyltestosterone is not available over the counter. Due to its classification as a Schedule III controlled substance by regulatory authorities, it must be obtained by prescription only.

Q: Why is Methyltestosterone taken by mouth?

Methyltestosterone is taken by mouth because of its specific chemical structure. It is a C17-alkylated derivative of testosterone, which is a structural modification that grants the active ingredient oral bioavailability. This property allows it to be reliably absorbed and effective when administered orally.

Q: Does Methyltestosterone show up on drug tests?

As a synthetic anabolic steroid and a Schedule III controlled substance, Methyltestosterone belongs to a class of compounds that are subject to regulatory control and testing. It belongs to a class of compounds that may be detectable in tests designed to screen for anabolic agents, such as those used in anti-doping contexts.

Q: Is the effect of Methyltestosterone reversible after stopping use?

For females, the official labeling warns that certain virilization effects (masculinization), such as a deepening of the voice and clitoral enlargement, are usually not reversible even after the medication is discontinued. The reversibility of other effects can vary.

Q: Does Methyltestosterone cause mood swings?

The official adverse reaction profile lists both anxiety and depression as potential effects on the nervous system. These documented side effects indicate the potential for changes in mood, consistent with what a user might describe as mood swings.

Q: What does research say about Methyltestosterone's impact on muscle mass?

According to the official mechanism of action, this drug is classified as an anabolic steroid, meaning it functions to promote protein anabolism (tissue building) and influences nitrogen balance. These biological processes are generally understood to affect muscle mass.

Q: Is Methyltestosterone a natural hormone?

No, Methyltestosterone is not a natural hormone. It is a synthetic (man-made) hormonal agent and a derivative of testosterone. Its therapeutic function is to chemically mimic the actions of the body's natural testosterone.

Q: Is there a generic version of Methyltestosterone available?

Yes, regulatory records indicate that the FDA has approved generic versions of methyltestosterone in both capsule and tablet forms. This means that lower-cost generic alternatives may be available.

Q: Does Methyltestosterone affect fertility in men?

Official product information states that oligospermia (low sperm count) may occur in men when the drug is taken at high doses. This potential change to sperm production is an officially documented side effect.

Q: Does Methyltestosterone interact with blood pressure medicine?

Regulatory documents advise caution, noting that testosterone use has been associated with a risk of hypertension (high blood pressure) or the worsening of pre-existing high blood pressure. The use of this medicine alongside antihypertensive drugs is one instance where blood pressure may require closer monitoring.

Q: Does taking Methyltestosterone require changes to my diet?

Official labeling states the medication may be taken with or without food. No specific mandatory dietary changes are detailed in the regulatory documents.

Q: Does Methyltestosterone affect the voice?

Yes, deepening of the voice is an officially documented side effect. In female patients, this is an effect of virilization (masculinization) that may be irreversible. In males, this is part of the drug’s intended androgenic action.

Q: Is it true that Methyltestosterone can affect cholesterol levels?

Yes, official regulatory documents list Increased serum cholesterol as an adverse reaction under the metabolic classification. This indicates that the drug can affect blood lipid levels.

Q: What does official guidance say about Methyltestosterone and heart health?

Official labeling states that the drug is associated with a possible increased risk of serious adverse cardiovascular events (such as myocardial infarction or stroke). It is also associated with a risk of Venous Thromboembolic Events (blood clots).

Q: How is the safety profile of Methyltestosterone viewed compared to injectable testosterone?

Official regulatory documents indicate that comparative evidence is lacking in large-scale studies against other available testosterone delivery systems. Therefore, no formal, direct safety comparison concerning its safety profile against injectable testosterone has been established by the available evidence.

Q: What is the main purpose of the 'black box' warning associated with some testosterone products?

The FDA's Boxed Warning (often referred to as a black box warning) for testosterone products primarily addresses two risks: the potential for misuse and abuse due to its anabolic properties, and the risk of serious adverse cardiovascular events (heart attack, stroke) when misused or used incorrectly.

Q: Why do some people confuse Methyltestosterone with anabolic steroids used for bodybuilding?

Methyltestosterone is formally classified as an anabolic steroid and is a Schedule III controlled substance. The official use of this terminology, coupled with the drug's anabolic properties, can lead to public confusion with illicit, high-dose use often associated with performance enhancement and bodybuilding.

Q: Does official evidence suggest Methyltestosterone helps with low energy?

Research evidence for its use in male hypogonadism indicates that findings were mixed and inconsistent across available studies for outcomes related to changes in energy levels. The drug's effect on energy is therefore not uniformly supported by the evidence summarized in regulatory documents.

How should Methyltestosterone be stored and disposed of?

Storage and Disposal Information

Scope Item Official Regulatory Statement
Labeled storage temperature requirements Store at Controlled Room Temperature (CRT), 20 C to 25 C (68 F to 77 F), with permitted excursions between 15 C and 30 C [1].
Light/moisture protection requirements Must be protected from light and stored away from moisture [1, 2].
Child-protection storage requirements Must be kept out of the reach of children [1]. Store in a safe place to protect the drug from theft, as it is a Schedule III Controlled Substance [2].
Disposal instructions Dispose of unused or outdated product by following local regulations or the advice of a healthcare professional or pharmacist [1].

Official storage documentation strictly mandates that this product must be stored within a specific temperature range and protected from light to maintain its chemical integrity. Handling requires that the medicine be stored securely and out of the reach of children due to its controlled substance classification. Final disposal of unused or expired medication must be conducted in compliance with established local pharmaceutical waste management rules as directed by regulatory labeling. The product must be stored in a closed container.

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

Available in countries:

Equivalent of Methyltestosterone found in:

A-Z Index: