Emtinofovir tablets are a second substitute for norfovir and its recommended dosage is 1 tablet once a day with food. This product is mainly used for the treatment of adult patients with chronic hepatitis B. It is commonly available in 25mg/tablet and is administered orally, one tablet a day, recommended to be taken with food at breakfast daily. If vomiting occurs within 1 hour of taking the tablet, another tablet should be taken. If vomiting occurs more than 1 hour after taking the medicine, a replacement dose is not required. If you miss a dose of this product, you should take a replacement tablet as soon as possible if it has not exceeded the usual dosing time of 18 hours, and then take it according to the usual dosing time; if it has exceeded 18 hours, you do not need to take a replacement tablet, and just take it according to the normal dosing time. Common adverse reactions after using this product include elevated alanine aminotransferase, elevated parathyroid hormone, elevated aspartate aminotransferase, hypophosphatemia, and is contraindicated in those who are allergic to this product. This product should be used for a long period of time, and should not be stopped at will, and the specific use of the drug should be in accordance with the doctor’s instructions.