Tenofovir disoproxil fumarate tablets are recommended to be taken orally 25mg once a day with food for those who meet the indications for use, as prescribed by the doctor. Tenofovir disoproxil fumarate is intended for the treatment of chronic hepatitis B in adults and adolescents who are 12 years of age or older and weigh at least 35 kg or more. The current recommendation is to take 1 tablet (size 25mg/tablet) once daily with food. If a dose is missed and the missed dose is less than 18 hours old, 1 dose can be made up quickly and the subsequent resumption of the normal dosage time is sufficient; if it is more than 18 hours old, the dose will not be made up and the subsequent period will be normal. If vomiting occurs within 1 hour of taking the dose, then 1 additional tablet may be made up; if more than 1 hour has passed, then no supplemental dose is required. The drug is contraindicated in people who are allergic to the product, and common adverse reactions to the drug include vomiting, nausea, abdominal pain, bloating, diarrhea, headache, dizziness, fatigue, elevated alanine aminotransferase, rash, pruritus, and arthralgia. Specific medications regarding this drug should be administered under the guidance of a specialist, and should not be used without authorization.