NZ Formulary



What does it do?

Fosfomycin is an antibiotic used to treat bladder infections that are resistant to usual treatments. It is sometimes used for other conditions.

How should you take it?

Take fosfomycin as directed. Mix the contents of the sachet in half a glass of water and drink straightaway. You can take it with or without food.

What if you forget a dose?

Take the missed dose as soon as possible and continue as directed.

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

Stomach upset

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 are pregnant, planning to become pregnant, or breastfeeding.
  • It may take 2 to 3 days before you start to feel better. Tell your doctor if you still have symptoms after this time.