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What's the difference between Viekira Pak and Viekira XR?

Medically reviewed by Last updated on Aug 25, 2019.

Official Answer


Viekira Pak contains two separate tablets co-packaged, and Viekira XR is a single fixed-dose combination tablet.

Viekira Pak and Viekira XR both contain the same four ingredient drugs for the treatment of adult patients with chronic hepatitis C virus (HCV) genotype 1 infection.

Viekira Pak

  • ombitasvir, paritaprevir, ritonavir tablets co-packaged with dasabuvir tablets

Viekira XR

  • ombitasvir, paritaprevir, ritonavir and dasabuvir extended release tablets

In May 2018, the FDA announced the discontinuation of Viekira XR with an estimated product availability through until January 1, 2019. The product discontinuation was voluntary.

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