Table of contents

  • Brand Names
  • Chemistry
  • Pharmacologic Category
  • Mechanism of Action
  • Therapeutic Use
  • Pregnancy and Lactation Implications
  • Contraindications
  • Warnings and Precautions
  • Adverse Reactions
  • Genes that may be involved
  • Substrate of
  • Drug Interactions
  • Dosage
  • Pharmacokinetics and Pharmacodynamics
  • Special Considerations

Brand Names

North America

USA: Android, Methyltestosterone, Testred.


Japan: Enerfa.

Drug combinations


Methyltestosterone: C~20~H~30~O~2~. Mw: 302.45. (1) Androst-4-en-3-one, 17-hydroxy-17-methyl-, (17β)-; (2) 17β-Hydroxy-17-methylandrost-4-en-3-one. CAS-58-18-4.

Pharmacologic Category

Hormones and Synthetic Substitutes; Androgens. (ATC-Code: G03BA02; G03EK01).

Mechanism of action

Stimulates receptors in organs and tissues to promote growth and development of male sex organs and maintains secondary sex characteristics in androgen-deficient males.

Therapeutic use

Hypogonadism. Delayed puberty. Impotence and climacteric symptoms. Palliative treatment of metastatic breast cancer.

Pregnancy and lactiation implications

Contraindicated during pregnancy and lactation.

Unlabeled use


Hypersensitivity to methyltestosterone or any component of the formulation. In males, known or suspected breast or prostate carcinoma. Pregnancy.

Warnings and precautions

Prolonged use and/or high doses may cause peliosis hepatis or liver cell tumors. Use with caution in breast cancer (might cause hypercalcemia by stimulating osteolysis), in diabetes mellitus, in conditions influenced by edema (e.g. cardiovascular disease, migraine, seizure disorder, renal impairment), in hepatic impairment, and in elderly patients. May accelerate bone maturation in children. Discontinue with evidence of mild virilization in women.



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