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What does it do?

Lansoprazole is used to treat and prevent some stomach and gut problems, such as indigestion, reflux, and ulcers. It reduces the amount of acid made in your stomach.

How should you take it?

Take lansoprazole regularly as directed with a glass of water. You can take it with or without food, but it may work better if you take it before food.
If you have trouble swallowing you can open the capsule and sprinkle the contents on a small amount of soft food or liquid. Swallow without chewing. Do not crush the capsule contents.

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?

Some medicines available without a prescription may react with lansoprazole including:

  • iron supplements (e.g. Ferro-Tab®)

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

Muscle twitching or cramps, tiredness or weakness, tingling or numbness (may be signs of low magnesium)

Tell your doctor

Headache

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.
  • If your symptoms are well managed, your doctor may recommend stopping lansoprazole. When you stop you may get symptoms like reflux and heartburn but these should only last for a few weeks. Talk to your health professional if these are troublesome, or if they do not get better.
  • Long-term use of lansoprazole may cause side effects such as weak bones and gut infections. Tell your doctor if you develop severe or persistent diarrhoea and abdominal pain.

This leaflet contains important, but not all, information about this medicine.

Prepared by the PILs Committee at Christchurch Hospital, Canterbury District Health Board, New Zealand. July 2022

For more general information about this sheet annd its contents, see: What does a My Medicines sheet cover?

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About My Medicines

My Medicines Patient Information Leaflets (PILs) contain important, but not all, information about the medicines they describe.

For more information about the sheets, see: What does a My Medicines sheet cover?

My Medicines is developed by a team at the Canterbury District Health Board. Our team is made up of doctors, pharmacists, and a non-medical person to help us keep to plain language. We also discuss our information with specialist health professionals or groups when needed