Testosterone Undecanoate Injection 1g/4ml

Medication Information Leaflet

What is this medication for?

Testosterone replacement is used to treat testosterone deficiency in males. It contains testosterone, a male hormone produced naturally in the body.

How should I take/use this medication?

  • The medication is injected into a muscle in your body, where is stored and gradually released over a period of time.
  • It is injected every 10-14 weeks.

What should I do if I forget to take/use this medication?

Inform your doctor if you missed your appointment for the injection.

What precautions should I take?

Inform your healthcare professional if:

  • You are allergic to this medication or any of the other ingredients of this medication
  • You have prostate or breast cancer
  • You have history of the following:
    • Liver or kidney problems
    • Heart conditions
    • Uncontrolled blood pressure
    • Clotting disorders
    • Epilepsy (fits)
    • Migraine
    • Benign prostate hyperplasia (enlargement of prostate)
    • Sleep apnea (a sleep disorder)
    • Diabetes
  • You are taking any other medications, including supplements, traditional medications and herbal remedies.

What are some common side-effects of this medication?

  • Acne
  • Injection site reaction (e.g. pain, bruising or irritation at the injection site)
  • Hot flushes
  • Increased in weight
  • Enlarged prostate
  • Breast enlargement

What are some rare but serious side-effects that I need to seek medical advice immediately?

The symptoms of a drug allergy include one or more of the following:

  • Swollen face/eyes/lips/tongue
  • Difficulty in breathing
  • Itchy skin rashes over your whole body

If you experience any of these symptoms, you should stop your medication and see your healthcare professional immediately.

What food or medication should I avoid when I take this medication?

Inform your doctor if you are taking oral anticoagulant (warfarin), corticosteroids, insulin or other anti-diabetic medications.

How should I store this medication?

Store in a cool and dry place, away from direct sunlight. Keep this medication away from pregnant women, breastfeeding women or children.

How should I throw away this medication safely?

Throw the used injection in sharps bin (injection is usually performed by healthcare professional)

If you take more than the recommended dose, please seek medical advice immediately. The information provided on this page does not replace information from your healthcare professional. Please consult your healthcare professional for more information.

This article is jointly developed by members of the National Medication Information workgroup. The workgroup consists of cluster partners (National Healthcare Group, National University Health System and SingHealth), community pharmacies (Guardian, Unity and Watsons) and Pharmaceutical Society of Singapore. The content does not reflect drug availability and supply information in pharmacies and healthcare institutions. You are advised to check with the respective institutions for such information.

Last updated on Feb 2021
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