Testosterone 1% Gel

Medication Information Leaflet

​What is this medication for?

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

How should I take/use this medication?

  • Do not stop using your medication without checking with your healthcare professional.
  • Apply once daily at about the same time, preferably in the morning. The daily dose should be adjusted and prescribed by the doctor.
  • The patient himself should administer the medication onto clean, dry, healthy skin over shoulder, arm or abdomen. Do not apply to genital area (penis and testes) as the high alcohol content may cause local irritation.
  • After opening the sachet, the entire content should be taken out of the sachet and applied immediately on the skin. Allow the gel to dry for at least 3-5 minutes before dressing. Wash your hands with soap and water after applying. 
  • You should preferably wait for at least 6 hours between applying the gel and taking a bath, swimming or washing the applied area.

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

If you forget to apply a dose, skip the missed dose and do not apply a double dose to make it up for the forgotten individual dose.

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:
    • 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. 
Pregnant women must avoid any contact with the applied area or the gel as the medication may cause the development of unwanted male characteristics in the developing baby. In the event of a contact, wash the area of contact as soon as possible with soap and water.

Testosterone may be transferred to another person during close and prolonged skin contact with the gel application area if no precaution is taken. Your partner may show signs of increased testosterone such as more hair growth on the face and body, a deepened voice and changes in the menstrual cycle if contact is made multiple times or for prolonged period. Do seek medical advice from your doctor if this happens. 

What are some common side-effects of this medication?

  • Reaction at the application area (e.g. redness of the skin, acne, dry skin)
  • Enlargement of the breast 
  • Headache 
  • Hair loss
  • Tingling sensation 

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 (e.g. 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 and children.

How should I throw away this medication safely?

Pack this medication into a black trash bag and seal it tightly before throwing into the rubbish chute or bin.

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
Back to Top