Read the Medication Guide provided by your pharmacist before you start using this medication and each time you receive an injection. If you have any questions, ask your doctor or pharmacist.
This medication is given by injection into the buttock muscle as directed by your doctor. After the first dose, it is usually given 4 weeks later, then every 10 weeks. The dosage is based on your medical condition, testosterone blood levels, and response to treatment.
Use this medication regularly to get the most benefit from it. To help you remember, use a calendar to mark the days you will receive an injection.
Misuse or abuse of testosterone can cause serious side effects such as heart disease (including heart attack), stroke, liver disease, mental/mood problems, abnormal drug-seeking behavior, or improper bone growth (in adolescents). Do not increase your dose or use this drug more often or for longer than prescribed. When testosterone is misused or abused, you may have withdrawal symptoms (such as depression, irritability, tiredness) when you suddenly stop using the drug. These symptoms may last from weeks to months.
- Indication
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Testosterone undecanoate is indicated for replacement therapy in adult males with conditions that are linked with an absence or deficiency in endogenous testosterone production.
- Mechanism of action
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Testosterone is produced by Leydig cells and exerts it's effects by binding to androgen receptors throughout the body. Testosterone affects the voice, genitalia, mood, and influences muscle growth and protein expression. Accordingly, males with low levels of testosterone often experience decreased libido, fatigue, mood changes and dysphoria. Exogenous sources of testosterone are designed to mimic the effects of endogenous testosterone.
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