What is Depo-Testosterone and how is it used?
Depo-Testosterone is a prescription medicine used to treat the symptoms of impotence, delayed puberty in males, hormonal imbalances as well as inoperable breast cancer in women. Depo-Testosterone may be used alone or with other medications.
Depo-Testosterone belongs to a class of drugs called Androgens.
It is not known if Depo-Testosterone is safe and effective in children younger than 12 years of age.
What are the possible side effects of Depo-Testosterone?
Depo-Testosterone may cause serious side effects including:
- chest pain or pressure,
- pain spreading to your jaw or shoulder,
- shortness of breath,
- breathing problems at night (sleep apnea),
- swelling in your ankles or feet,
- rapid weight gain,
- convulsions (seizure),
- unusual changes in mood or behavior,
- increased or ongoing erection of the penis,
- ejaculation problems,
- decreased amounts of semen,
- decrease in testicle size,
- painful or difficult urination,
- increased urination at night,
- loss of bladder control,
- stomach pain,
- increased thirst or urination,
- muscle pain or weakness,
- joint pain,
- feeling tired or restless,
- tingly feeling,
- irregular heartbeats,
- loss of movement,
- right-sided upper stomach pain,
- loss of appetite,
- dark urine,
- yellowing of the eyes or skin (jaundice),
- welling, warmth or redness in an arm or leg,
- sudden cough,
- rapid breathing,
- coughing up blood,
- sudden numbness (especially on one side of your body),
- severe headache,
- slurred speech, and
- balance problems
Get medical help right away, if you have any of the symptoms listed above.
The most common side effects of Depo-Testosterone include:
- changes in your menstrual periods (including missed periods),
- male-pattern hair growth (on the chin or chest),
- hoarse or deepened voice, and
- enlarged clitoris
Testosterone cypionate is a white or creamy white crystalline powder, odorless or nearly so and stable in air. It is insoluble in water, freely soluble in alcohol, chloroform, dioxane, ether, and soluble in vegetable oils.
The chemical name for testosterone cypionate is androst-4-en-3-one, 17-(3-cyclopentyl1- oxopropoxy)-, (17ß)-. Its molecular formula is C27H40O3, and the molecular weight 412.61.
The structural formula is represented below:
DEPO-Testosterone Injection is available in two strengths, 100 mg/mL and 200 mg/mL testosterone cypionate.
Each mL of the 100 mg/mL solution contains:
Testosterone cypionate: 100 mg
Benzyl benzoate: 0.1 mL
Cottonseed oil: 736 mg
Benzyl alcohol (as preservative): 9.45 mg
Each mL of the 200 mg/mL solution contains:
Testosterone cypionate: 200 mg
Benzyl benzoate: 0.2 mL
Cottonseed oil: 560 mg
Benzyl alcohol (as preservative): 9.45 mg
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DEPO-Testosterone Injection is indicated for replacement therapy in the male in conditions associated with symptoms of deficiency or absence of endogenous testosterone.
- Primary hypogonadism (congenital or acquired)-testicular failure due to cryptorchidism, bilateral torsion, orchitis, vanishing testis syndrome; or orchidectomy.
- Hypogonadotropic hypogonadism (congenital or acquired)-gonadotropin or LHRH deficiency, or pituitary-hypothalamic injury from tumors, trauma, or radiation.
Safety and efficacy of DEPO-Testosterone (testosterone cypionate) in men with “agerelated hypogonadism” (also referred to as “late-onset hypogonadism”) have not been established.
DOSAGE AND ADMINISTRATION
Prior to initiating DEPO-Testosterone (testosterone cypionate), confirm the diagnosis of hypogonadism by ensuring that serum testosterone concentrations have been measured in the morning on at least two separate days and that these serum testosterone concentrations are below the normal range.
DEPO-Testosterone Injection is for intramuscular use only.
It should not be given intravenously. Intramuscular injections should be given deep in the gluteal muscle.
The suggested dosage for DEPO-Testosterone Injection varies depending on the age, sex, and diagnosis of the individual patient. Dosage is adjusted according to the patient’s response and the appearance of adverse reactions.
Various dosage regimens have been used to induce pubertal changes in hypogonadal males; some experts have advocated lower dosages initially, gradually increasing the dose as puberty progresses, with or without a decrease to maintenance levels. Other experts emphasize that higher dosages are needed to induce pubertal changes and lower dosages can be used for maintenance after puberty. The chronological and skeletal ages must be taken into consideration, both in determining the initial dose and in adjusting the dose.
For replacement in the hypogonadal male, 50-400 mg should be administered every two to four weeks.
Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit. Warming and shaking the vial should redissolve any crystals that may have formed during storage at temperatures lower than recommended.
DEPO-Testosterone Injection is available as follows:
10 mL vials NDC 0009-0347-02
1 mL vials NDC 0009-0417-01
10 mL vials NDC 0009-0417-02
Vials should be stored at controlled room temperature 20° to 25°C (68° to 77°F) [see USP]. Protect from light.
Distributed by: Pfizer, Pharmacia & Upjohn Company, Division of Pfizer Inc, NY, NY 10017. Revised: April 2015
The following adverse reactions in the male have occurred with some androgens:
Fluid and electrolyte disturbances: Retention of sodium, chloride, water, potassium, calcium, and inorganic phosphates.
Allergic: Hypersensitivity, including skin manifestations and anaphylactoid reactions.
Vascular disorders: Venous thromboembolism.
Miscellaneous: Inflammation and pain at the site of intramuscular injection.
Androgens may increase sensitivity to oral anticoagulants. Dosage of the anticoagulant may require reduction in order to maintain satisfactory therapeutic hypoprothrombinemia.
Concurrent administration of oxyphenbutazone and androgens may result in elevated serum levels of oxyphenbutazone.
Drug Abuse And Dependence
Controlled Substance Class
Testosterone is a controlled substance under the Anabolic Steroids Control Act, and DEPO-Testosterone Injection has been assigned to Schedule III.
Hypercalcemia may occur in immobilized patients. If this occurs, the drug should be discontinued.
Prolonged use of high doses of androgens (principally the 17-α alkyl-androgens) has been associated with development of hepatic adenomas, hepatocellular carcinoma, and peliosis hepatis —all potentially life-threatening complications.
There have been postmarketing reports of venous thromboembolic events, including deep vein thrombosis (DVT) and pulmonary embolism (PE), in patients using testosterone products, such as testosterone cypionate. Evaluate patients who report symptoms of pain, edema, warmth and erythema in the lower extremity for DVT and those who present with acute shortness of breath for PE. If a venous thromboembolic event is suspected, discontinue treatment with testosterone cypionate and initiate appropriate workup and management.
Long term clinical safety trials have not been conducted to assess the cardiovascular outcomes of testosterone replacement therapy in men. To date, epidemiologic studies and randomized controlled trials have been inconclusive for determining the risk of major adverse cardiovascular events (MACE), such as non-fatal myocardial infarction, nonfatal stroke, and cardiovascular death, with the use of testosterone compared to non-use. Some studies, but not all, have reported an increased risk of MACE in association with use of testosterone replacement therapy in men. Patients should be informed of this possible risk when deciding whether to use or to continue to use DEPO-Testosterone (testosterone cypionate).
Gynecomastia may develop and occasionally persists in patients being treated for hypogonadism.
The preservative benzyl alcohol has been associated with serious adverse events, including the “gasping syndrome”, and death in pediatric patients. Although normal therapeutic doses of this product ordinarily deliver amounts of benzyl alcohol that are substantially lower than those reported in association with the “gasping syndrome”, the minimum amount of benzyl alcohol at which toxicity may occur is not known. The risk of benzyl alcohol toxicity depends on the quantity administered and the hepatic capacity to detoxify the chemical. Premature and low-birth weight infants may be more likely to develop toxicity.
Androgen therapy should be used cautiously in healthy males with delayed puberty. The effect on bone maturation should be monitored by assessing bone age of the wrist and hand every 6 months. In children, androgen treatment may accelerate bone maturation without producing compensatory gain in linear growth. This adverse effect may result in compromised adult stature. The younger the child the greater the risk of compromising final mature height.
This drug has not been shown to be safe and effective for the enhancement of athletic performance. Because of the potential risk of serious adverse health effects, this drug should not be used for such purpose.
Patients with benign prostatic hypertrophy may develop acute urethral obstruction. Priapism or excessive sexual stimulation may develop. Oligospermia may occur after prolonged administration or excessive dosage. If any of these effects appear, the androgen should be stopped and if restarted, a lower dosage should be utilized.
Testosterone cypionate should not be used interchangeably with testosterone propionate because of differences in duration of action.
Testosterone cypionate is not for intravenous use.
Serum cholesterol may increase during androgen therapy.
Drug/Laboratory Test Interferences
Androgens may decrease levels of thyroxine-binding globulin, resulting in decreased total T4 serum levels and increased resin uptake of T3 and T4. Free thyroid hormone levels remain unchanged, however, and there is no clinical evidence of thyroid dysfunction.
Testosterone has been tested by subcutaneous injection and implantation in mice and rats. The implant induced cervical-uterine tumors in mice, which metastasized in some cases. There is suggestive evidence that injection of testosterone into some strains of female mice increases their susceptibility to hepatoma. Testosterone is also known to increase the number of tumors and decrease the degree of differentiation of chemically induced carcinomas of the liver in rats.
There are rare reports of hepatocellular carcinoma in patients receiving long-term therapy with androgens in high doses. Withdrawal of the drugs did not lead to regression of the tumors in all cases.
Geriatric patients treated with androgens may be at an increased risk of developing prostatic hypertrophy and prostatic carcinoma although conclusive evidence to support this concept is lacking.
Pregnancy Category X. (See CONTRAINDICATIONS.)
Benzyl alcohol can cross the placenta. See WARNINGS.
DEPO-Testosterone is not recommended for use in nursing mothers.
Safety and effectiveness in pediatric patients below the age of 12 years have not been established.
There have been no reports of acute overdosage with the androgens.
- Known hypersensitivity to the drug
- Males with carcinoma of the breast
- Males with known or suspected carcinoma of the prostate gland
- Women who are or who may become pregnant
- Patients with serious cardiac, hepatic or renal disease
Endogenous androgens are responsible for normal growth and development of the male sex organs and for maintenance of secondary sex characteristics. These effects include growth and maturation of the prostate, seminal vesicles, penis, and scrotum; development of male hair distribution, such as beard, pubic, chest, and axillary hair; laryngeal enlargement, vocal cord thickening, and alterations in body musculature and fat distribution. Drugs in this class also cause retention of nitrogen, sodium, potassium, and phosphorous, and decreased urinary excretion of calcium. Androgens have been reported to increase protein anabolism and decrease protein catabolism. Nitrogen balance is improved only when there is sufficient intake of calories and protein.
Androgens are responsible for the growth spurt of adolescence and for eventual termination of linear growth, brought about by fusion of the epiphyseal growth centers. In children, exogenous androgens accelerate linear growth rates, but may cause disproportionate advancement in bone maturation. Use over long periods may result in fusion of the epiphyseal growth centers and termination of the growth process. Androgens have been reported to stimulate production of red blood cells by enhancing production of erythropoietic stimulation factor.
During exogenous administration of androgens, endogenous testosterone release is inhibited through feedback inhibition of pituitary luteinizing hormone (LH). At large doses of exogenous androgens, spermatogenesis may also be suppressed through feedback inhibition of pituitary follicle stimulating hormone (FSH).
There is a lack of substantial evidence that androgens are effective in fractures, surgery, convalescence, and functional uterine bleeding.
Testosterone esters are less polar than free testosterone. Testosterone esters in oil injected intramuscularly are absorbed slowly from the lipid phase; thus, testosterone cypionate can be given at intervals of two to four weeks.
Testosterone in plasma is 98 percent bound to a specific testosterone-estradiol binding globulin, and about 2 percent is free. Generally, the amount of this sex-hormone binding globulin in the plasma will determine the distribution of testosterone between free and bound forms, and the free testosterone concentration will determine its half-life.
About 90 percent of a dose of testosterone is excreted in the urine as glucuronic and sulfuric acid conjugates of testosterone and its metabolites; about 6 percent of a dose is excreted in the feces, mostly in the unconjugated form. Inactivation of testosterone occurs primarily in the liver. Testosterone is metabolized to various 17-keto steroids through two different pathways.
The half-life of testosterone cypionate when injected intramuscularly is approximately eight days.
In many tissues the activity of testosterone appears to depend on reduction to dihydrotestosterone, which binds to cytosol receptor proteins. The steroid-receptor complex is transported to the nucleus where it initiates transcription events and cellular changes related to androgen action.
Patients should be instructed to report any of the following: nausea, vomiting, changes in skin color, ankle swelling, too frequent or persistent erections of the penis.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.