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What does it do?

Olsalazine is used to treat and prevent inflammatory bowel diseases, such as ulcerative colitis.

How should you take it?

Take olsalazine regularly as directed, with food and a glass of water.

What if you forget a dose?

Take the missed dose as soon as possible. If it is close to the time for your next dose, skip the missed dose and carry on as normal. 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 allergy including: skin rash, itching, swelling, trouble breathing

Increased risk of infection - symptoms may include: fever, chills, sore throat, aches and pains, tiredness, pain when peeing, mouth ulcers

Easy/unusual bruising or bleeding

Severe stomach pain, nausea

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

Chest pain

Tell your doctor immediately

Diarrhoea, stomach upset

Tell your doctor

Headache

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 asthma, or have had problems with aspirin.
  • Tell your doctor if you have liver or kidney problems.
  • Tell your doctor if you are pregnant, planning to become pregnant, or breastfeeding.
  • You will need regular blood tests while taking olsalazine to check if it is causing problems with your liver, kidneys or blood.
  • You may not notice the effects of olsalazine straight away – it can take several weeks before you start to feel better.

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. December 2017

For more general information about this sheet and 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