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NZ Formulary

Viekira Pak (dasabuvir, ombitasvir, paritaprevir and ritonavir)

vee-kee-rah pak

What does it do?

Viekira Pak® is used to treat Hepatitis C virus infection.

Before you start

  • Tell your doctor if you have HIV, hepatitis B, or had an organ transplant.
  • Tell your doctor if you are pregnant, planning to become pregnant, or breastfeeding.

How should you take it?

Take Viekira Pak® as directed on the pack with food and a glass of water. It is important to take it regularly. If you often forget to take it, it may not work as well. Keep taking it until the course is finished. Swallow the tablets whole, do not crush or chew them.

What if you forget a dose?

If you forget your morning tablets, take them when you remember on the same day. If that is after lunch, skip your evening tablet and go back to usual times the next day.

Can you take other medicines?

Viekira Pak® can react with many medicines, sometimes with severe results.

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 (e.g. ecstasy).

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

Tell your doctor immediately

Headache, irritability, trouble sleeping, tiredness or weakness


Diarrhoea, nausea

Tell your doctor if troublesome

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

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

Prepared by the MyMedicines Committee at Christchurch Hospital, Te Whatu Ora - Waitaha, New Zealand. March 2023

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 Te Whatu Ora – Waitaha. 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