Testosterone Enanthate

Indications

Testosterone Enanthate is used for: Inoperable metastatic breast cancer, Delayed puberty, Male hypogonadism

Adult Dose

Intramuscular Male hypogonadism Adult: 50-400 mg every 2-4 wk (or an initial dose of 250 mg every 2-3 wk followed by a maintenance dose every 3-6 wk); Inoperable metastatic breast cancer Adult: As enanthate: 200-400 mg every 2-4 wk.

Child Dose

Hypogonadism <12 years Safety and efficacy not established >12 years 50-400 mg IM every 2-4 weeks

Renal Dose

Administration

For IM use, should be administered deep in gluteal muscle

Contra Indications

Hypercalcaemia or hypercalciuria, males with breast or prostate carcinoma. Pregnancy and lactation.

Precautions

Cardiovascular disorders, skeletal metastases, renal or hepatic impairment, epilepsy, migraine, diabetes or other conditions which may be aggravated by fluid retention, eg heart failure. Elderly, prepubertal boys. Monitor signs of virilization (females) and development of priapism or excessive sexual stimulation (males). Periodic haemoglobin, lipid determinations and rectal prostate examination. Lactation: Drug is excreted into breast milk; avoid using

Pregnancy-Lactation

Pregnancy Contraindicated in pregnant women Teratogenic; may cause fetal harm when administered to a pregnant woman based on data from animal studies and its mechanism of action Exposure of a female fetus to androgens may result in varying degrees of virilization Animal data In animal developmental studies, exposure to testosterone in utero resulted in hormonal and behavioral changes in offspring and structural impairments of reproductive tissues in female and male offspring These studies did not meet current standards for nonclinical development toxicity studies Infertility During treatment with large doses of exogenous androgens, spermatogenesis may be suppressed through feedback inhibition of the hypothalamic-pituitary-testicular axis Observed reduced fertility in some men taking testosterone replacement therapy; impact on fertility may be irreversible Lactation Not indicated for women

Interactions

Enhance activities of ciclosporine, antidiabetics, thyroxine, anticoagulants. Long term use of testosterone may cause resistance to effects of neuromuscular blockers. Enhance fluid retention from corticosteroids

Adverse Effects

Side effects of Testosterone Enanthate : Fluid and electrolyte retention; increased vascularity of the skin; hypercalcaemia, impaired glucose tolerance; increased bone growth and skeletal weight; increase LDL cholesterol; increase haematocrit and fibrinolytic activity; headache, depression and GI bleeding. Males: spermatogenesis suppression, priapism, gynaecomastia, prostatic hyperplasia and accelerate growth of malignant prostate neoplasms. Females: suppression of lactation, ovarian activity and menstruation; virilization, clitoris hypertrophy, increased libido, oily skin, acne, hirsutism, male pattern baldness. Children: Closure of the epiphyses and stop linear growth in early puberty, symptoms of virilisation. Precocious sexual development, increased frequency of erection in boys, and clitoral enlargement in girls. IM: urticaria, inflammation at Inj site, postinjection induration, furunculosis. Potentially Fatal: Peliosis hepatis, liver toxicity, malignant neoplasm.

Mechanism of Action

Testosterone is the principal endogenous androgen responsible for promoting the growth and development of male sexual organs and maintaining secondary sex characteristics in androgen-deficient males.