 <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]  B virus. Long-term infection can cause liver damage, rarely liver cancer, and liver failure. Entecavir helps to decrease the amount of hepatitis B virus in your body. It is unknown if this medication lowers your chance of getting liver cancer or liver damage. Entecavir is an antiviral that belongs to a class of drugs known as hepatitis B virus nucleoside reverse transcriptase inhibitors.Entecavir is not a cure for hepatitis B. It does not prevent the spread of the virus to others through sexual contact or blood/body fluid contamination (such as sharing used needles). How to use Entecavir Read the Patient Information Leaflet provided by your pharmacist before you start taking entecavir and each time you get a refill. If you have any questions, ask your doctor or pharmacist. Take this medication by mouth on an empty stomach (at least 2 hours after a meal and 2 hours before the next meal) as directed by your doctor, usually once daily. If you are taking entecavir oral liquid, carefully measure your dose with the medicine spoon provided. Do not use a household spoon because you may not get the correct dose. Swallow the medicine directly from the measuring spoon. Do not mix the medication with water </s>