What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.

Viekira (Ombitasvir/Paritaprevir/Ritonavir/Dasabuvir)


Viekira (Ombitasvir/Paritaprevir/Ritonavir/Dasabuvir)

Prescription Required

12.5 / 75 / 50 mg

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  • Product Details


    What is VIEKIRA?

    • Viekira (ombitasvir/paritaprevir/ritonavir/dasabuvir) is a combination medication used to treat hepatitis C.

    How does it work?

    • The drugs contained in Viekira work together to disrupt the replication processes used by hepatitis C.

    How is it supplied?

    • Viekira comes in a pack, called the Viekira Pak. The Viekira Pak contains:
      • Combination tablets containing ombitasvir 12.5mg/paritaprevir 75mg/ritonavir 50mg
      • Dasabuvir 250mg tablets

    How should I store it?

    • Store your Viekira at room temperature and keep it out of reach of children.


    Should I take it with food?

    • Yes, you should take Viekira with a meal.

    Are there any special instructions for taking VIEKIRA?

    • Your doctor could adjust your dose, depending on the type of hepatitis C. virus and your liver function.
    • Your doctor could use Viekira in combination with ribavirin. Take your prescriptions exactly as your doctor writes them.

    What is the usual dose?

    • Viekira Pak dosing works as follows:
      • Take two ombitasvir/paritaprevir/ritonavir tablets by mouth once per day in the morning, and
      • Take one dasabuvir tablet by mouth twice daily.


    What are the active ingredients?

    • Ombitasvir
    • Paritaprevir
    • Ritonavir
    • Dasabuvir

    What are the inactive ingredients?

    Fact Table


    Ombitasvir: C50H67N7O8, Paritaprevir: C40H43N7O7S, Ritonavir: C37H48N6O5S2, Dasabuvir: C26H27N3O5S




    Varies, 70%

    Legal status

    RX Only

    Chemical Name

    Ombitasvir, Paritaprevir, Ritonavir, Dasabuvir

    Elimination half-life

    Ombitasvir: 21 – 25 hours, Paritaprevir: 5.5 hours, Ritonavir: 3-5 hours, Dasabuvir: 5.5- 6 hours

    Dosage (Strength)

    12.5/75/50mg (28 ampules)


    Consult a doctor


    Viekira Pak, Exviera,Norvir, Kaletra

    Protein binding

    Ombitasvir: 99.9%, Paritaprevir: 97-98.6%, Ritonavir: 98-99%, Dasabuvir: less than 99.5%

    PubChem CID

    Ombitasvir: 54767916, Paritaprevir: 45110509, Ritonavir: 392622, Dasabuvir: 56640146




    Ombitasvir: 85183, Paritaprevir: 85188, Ritonavir: 45409, Dasabuvir: 85182

    ATC code



    Ombitasvir: DB09296, Paritaprevir: DB09297, Ritonavir: DB00503, Dasabuvir: DB09183


    Ombitasvir: D10576, Paritaprevir: D10580, Ritonavir: D00427, Dasabuvir: D10553

    Routes of administration

    By mouth


    Who should avoid taking VIEKIRA?

    • Viekira can have severe drug interactions with several drugs. Tell your doctor about every medication you take, including over the counter drugs. See Section 4 of the package insert for a full list of medications that must be avoided while taking Viekira.
    • You should not take Viekira if:
      • You are allergic to any of the ingredients listed in the package insert.
      • You have severe liver disease.

    What are the risks associated with taking VIEKIRA?

    • Viekira has a black box warning regarding hepatitis B infection. If you have ever had hepatitis B, taking Viekira can increase your risk of reactivation of the infection. Your doctor should monitor you closely if you have ever had hepatitis B.
    • Viekira can have adverse effects on your liver. Your doctor should monitor your liver function periodically. They could decide to stop your treatment if you develop complications.
    • Women who use birth control products containing ethinyl estradiol should stop taking their birth control before starting Viekira. Progesterone-only birth control products and non-hormonal products are safe options.
    • If you are pregnant or considering becoming pregnant, discuss the risks with your physician. You should avoid becoming pregnant if your doctor as prescribed ribavirin as a combination treatment.
    • Viekira therapy can lead to treatment resistance in patients who are infected with HIV. Your doctor should use additional HIV medications to reduce your risk of developing treatment-resistant HIV.

    Side Effects

    What are the common Viekira Pak side effects?

    • Itching
    • Nausea
    • Insomnia
    • Fatigue

    What are the serious Viekira Pak side effects?

    • Increased liver enzymes
    • Liver injury
    • Liver failure
    • Hepatitis B reactivation

    Other Considerations

    • Compare the Viekira Pak price at Canada Pharmacy to your local drug store.

    Frequently Asked Questions about Viekira

    What is Viekira?

    Viekira is a prescription medication used to treat chronic hepatitis C infection in adults. It contains a combination of four active ingredients: ombitasvir, paritaprevir, ritonavir, and dasabuvir.

    How does Viekira work?

    Viekira works by targeting the hepatitis C virus (HCV) and inhibiting its replication in the body. Ombitasvir, paritaprevir, ritonavir, and dasabuvir work together to block the virus from multiplying, allowing the body's immune system to clear the infection.

    Who is Viekira intended for?

    Viekira is typically prescribed for adults with chronic hepatitis C genotype 1 infection, which is the most common genotype in the United States.

    Is Viekira effective in treating hepatitis C?

    Yes, Viekira has been shown to be highly effective in treating hepatitis C genotype 1 infection. However, its effectiveness may vary depending on factors such as the specific genotype of the virus and the presence of any liver damage.

    How is Viekira taken?

    Viekira is usually taken as a combination of multiple tablets or pills, often with a meal. The exact dosing and duration of treatment will be determined by your healthcare provider.

    What are the common side effects of Viekira?

    Common side effects of Viekira may include fatigue, headache, nausea, itching, and difficulty sleeping. It's important to discuss any side effects with your healthcare provider.

    Are there any serious side effects of Viekira?

    While serious side effects are rare, Viekira may cause severe liver problems or a worsening of liver disease in some individuals. If you experience symptoms like yellowing of the skin or eyes, dark urine, or abdominal pain, contact your healthcare provider immediately.

    Can Viekira be used during pregnancy or breastfeeding?

    Viekira should not be used during pregnancy without careful consideration and consultation with a healthcare provider. It is also not recommended during breastfeeding, as it may pass into breast milk.

    How long does the treatment with Viekira typically last?

    The duration of treatment with Viekira can vary depending on individual factors and the genotype of the hepatitis C virus. Treatment can range from 12 to 24 weeks, and your healthcare provider will determine the appropriate duration for your specific case.

    Is Viekira a cure for hepatitis C?

    Viekira can lead to a sustained virologic response (SVR), which means that the hepatitis C virus is undetectable in the blood for a specific period after completing treatment. While this is considered a cure in many cases, long-term follow-up is still recommended to ensure the virus does not return.

    IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.

    Product Code : 13254

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