NZ Formulary

Testosterone (capsule)


What does it do?

Testosterone is a male sex hormone. It is used when the levels of testosterone in your body are too low.

How should you take it?

Take testosterone regularly as directed with food and a glass of water. Swallow the capsules whole.

What if you forget a dose?

If it is nearly time for your next dose, skip the missed dose and take your next dose at the usual time. Otherwise, take the missed dose as soon as you remember. Do not take two doses at the same time.

Can you take other medicines?

Tell your pharmacist or doctor about all medicines or treatments that you may be taking, including vitamins, herbal products or recreational drugs.

What side effects might you notice?

Side EffectsRecommended action

Symptoms of liver problems including: yellow skin or eyes, itching, dark urine, pale bowel motions, abdominal pain

Prolonged erection (longer than four hours)

Tell your doctor immediately

Mood changes, headache

Head hair loss, more body and facial hair


Sore or enlarged breasts

More or less interest in sex

Swollen feet or legs

Stomach upset

In women: changes in periods, voice deepening

Tell your doctor if troublesome

If you notice any other effects, discuss them with your doctor or pharmacist.

Other information:

  • Tell your doctor if you have heart, liver or prostate problems, or if you have ever had breast cancer, a blood clot or a stroke.
  • Tell your doctor if you are pregnant, planning to become pregnant, or breastfeeding.
  • You will need regular blood tests while you are taking testosterone to check your blood and your prostate (for men), and to make sure you are taking the right dose.