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Testosterone enanthate

Subcutaneous
Intramuscular
Class
Sex hormones
Subclass
Androgens
Substance name
Testosterone enanthate
Brand names
Xyosted®
Contains
Testosterone
See also
Testosterone undecanoate (Kyzatrex®, Aveed®, Tlando®, Jatenzo®)
Testosterone cypionate
Dosage and administration
Adults patients
Hypogonadotropic hypogonadism in males
Start at: 75 mg SC weekly
Maintenance: 50-100 mg SC weekly
Administer only in the abdominal region. Titrate based on total testosterone trough concentrations (measured 7 days after the most recent dose) at 6 weeks after starting therapy, 6 weeks after any dose adjustment, and periodically thereafter.
Primary hypogonadism in males
Start at: 75 mg SC weekly
Maintenance: 50-100 mg SC weekly
Administer only in the abdominal region. Titrate based on total testosterone trough concentrations (measured 7 days after the most recent dose) at 6 weeks after starting therapy, 6 weeks after any dose adjustment, and periodically thereafter.
Gender dysphoriaOff-label
100-200 mg SC q2 weeks
Administer only in the abdominal region.
Indications for use
Labeled indications
Adults
Treatment of hypogonadotropic hypogonadism in males
Treatment of primary hypogonadism in males
Off-label indications
Adults
Treatment of gender dysphoria
Safety risks
Boxed warnings
Increased BP
Use extreme caution, as testosterone enanthate is associated with an increased risk of elevated BP, which may lead to major adverse cardiovascular events, particularly in patients with cardiovascular risk or pre-existing hypertension. Before starting treatment, assess baseline cardiovascular risk, ensure BP control, and monitor BP 6 weeks after initiation and periodically thereafter. Manage new-onset or worsening hypertension and re-evaluate therapy risks versus benefits in patients who develop cardiovascular risk factors or disease.
Contraindications
Hypersensitivity to testosterone enanthate or its components
Carcinoma of the breast (males)
Known or suspected carcinoma of the prostate
Males with hypogonadal conditions that are not associated with structural or genetic etiologies, such as age-related hypogonadism.
Warnings and precautions
Bacillary peliosis hepatis, liver cancer, cholestatic jaundice
Use caution in patients on prolonged high doses of testosterone enanthate.
Decreased serum total T4
Maintain a high level of suspicion, as testosterone enanthate therapy may decrease TBG concentrations.
Decreased sperm concentration
Use caution in patients on large doses of testosterone enanthate, as it may suppress spermatogenesis and reduce sperm count.
Dependence and withdrawal reactions
Use caution with testosterone enanthate outside approved dosages or indications, as abuse may lead to dependence, addiction, and withdrawal symptoms.
Depression, suicidal ideation
Use caution in patients with depression.
Drug abuse
Maintain a high level of suspicion, as testosterone enanthate is often abused at higher-than-recommended doses and in combination with other anabolic steroids, leading to serious cardiovascular and psychiatric adverse effects. Counsel patients on these risks. If abuse is suspected, check serum testosterone levels, noting they may appear normal or subnormal in men using synthetic derivatives, and consider abuse in patients with severe cardiovascular or psychiatric symptoms.
Dyslipidemia
Maintain a high level of suspicion, as testosterone enanthate is associated with a risk of dyslipidemia. Periodically monitor the lipid profile, particularly at the start of therapy.
Erythrocytosis, polycythemia
Maintain a high level of suspicion, as testosterone enanthate has been associated with an increased risk of polycythemia/erythrocytosis, typically observed within 1 month to 1 year after initiation. Evaluate hematocrit before starting therapy, reassess at 3 to 6 months, and monitor annually. Discontinue if hematocrit exceeds 54%.
Exacerbation of BPH
Use caution in patients with BPH.
Fluid retention, congestive HF
Use caution in patients with pre-existing cardiac, renal, or hepatic disease.
Gynecomastia
Maintain a high level of suspicion, as testosterone enanthate is associated with an increased risk of gynecomastia, which may be persistent.
Hypercalcemia
Use caution in patients with cancer or prolonged immobilization.
Major cardiovascular events
Maintain a high level of suspicion, as studies suggest a potential risk of major adverse cardiovascular events, including myocardial infarction, stroke, and cardiovascular death, with testosterone enanthate, though the evidence remains inconclusive.
Prostate cancer
Maintain a high level of suspicion, as testosterone enanthate is associated with an increased risk of prostatic carcinoma.
Sleep apnea
Use caution in obese patients or those with chronic lung disease.
VTE
Maintain a high level of suspicion, as testosterone enanthate is associated with an increased risk of DVT and PE. Discontinue therapy if VTE is suspected.
Specific populations
Renal impairment
eGFR 0-90 mL/min/1.73 m²
Use with caution. No guidance available. Monitor for fluid retention.
Renal replacement therapy
Any modality
Use with caution. No guidance available. Monitor for fluid retention.
Hepatic impairment
Any severity
No guidance available. Use with caution.
Pregnancy and breastfeeding
Pregnancy
All trimesters • Australia Category: D
Avoid use. Evidence of fetal harm in humans. Discontinue treatment immediately if pregnancy occurs, and evaluate the potential hazard to the fetus. Testosterone may transfer from treated men to women who are pregnant or may become pregnant, potentially causing varying degrees of virilization in the fetus.
Breastfeeding
Do not use during breastfeeding.
Unknown amount excreted in breastmilk.
Unknown drug levels in breastfed infants.
Some adverse effects on lactation reported.
Adverse reactions
Very common > 10%
Hypertension, ↑ hematocrit
Common 1-10%
Acne, ↑ RBCs, ↑ serum CK, ↑ serum testosterone, peripheral edema, abdominal pain, arthralgia, back pain, cough, fatigue, headache, hematuria, injection site pain, insomnia, nausea, sleep apnea, urinary tract infections
Unknown frequency
Alopecia, anaphylactoid reactions, bacillary peliosis hepatis, breast cancer, cerebrovascular accident, cholestatic liver disease, deep venous thrombosis, drug-induced liver injury, gynecomastia, hirsutism, ↑ LFTs, ↑ WBC count, ↑ hemoglobin, ↑ serum calcium, ↑ serum cholesterol, ↑ serum sodium, jaundice, liver cancer, major cardiovascular events, myocardial infarction, oligozoospermia, pulmonary embolism, prostate cancer, amenorrhea, anxiety, ↓ libido, depression, ↑ libido, paresthesia, priapism, suicidal ideation, venous thromboembolism, virilization
Interactions
Drug(s)
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