 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  other tablet contains dasabuvir.This product is used to treat chronic (long-lasting) hepatitis C, a viral infection of the liver. Ombitasvir, paritaprevir, and dasabuvir work by reducing the amount of hepatitis C virus in your body, which helps your immune system fight the infection and may help your liver recover. Ritonavir is used to increase ("boost") the levels of paritaprevir. This helps paritaprevir work better. This product may also be used with a certain other medication (ribavirin). Chronic hepatitis C infection can cause serious liver problems such as scarring (cirrhosis), or liver cancer.It is not known if this treatment can prevent you from passing the virus to others. Do not share needles, and practice "safer sex" (including the use of latex condoms) to lower the risk of passing the virus to others. How to use Viekira Pak Read the Medication Guide provided by your pharmacist before you start taking this product and each time you get a refill. Follow the instructions very closely since this product contains tablets with different drugs. If you have any questions, ask your doctor or pharmacist. Take this product by mouth </s>