What does it do?

Finasteride is used to treat problems caused by an enlarged prostate, such as trouble peeing. It is also sometimes used to treat head hair loss in men.

How should you take it?

Take finasteride regularly as directed with a glass of water.

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 (e.g. St John's wort) or recreational drugs.

What side effects might you notice?

Side EffectsRecommended action

Sore or enlarged breasts

Low mood

Tell your doctor

Less interest in sex, trouble getting or keeping an erection

Tell your doctor if troublesome

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

Other information:

  • It may take a few months for finasteride to start working.
  • Pregnant women should not take finasteride or handle broken or crushed tablets. Tell your doctor if your partner is pregnant, or planning to become pregnant. For more information, you can also visit -