According to the drug’s instructions for use, tenofovir is indicated for adults and pediatric patients ≥12 years of age, and is properly administered orally, 300 mg (one tablet) once daily, on an empty stomach or with food. Tenofovir, whose full name is tenofovir disoproxil fumarate tablets, is commonly used in the treatment of chronic hepatitis B and HIV. The correct way to take tenofovir disoproxil fumarate tablets is by mouth, 300 mg (one tablet) once a day, on an empty stomach or with food. Tenofovir disoproxil fumarate tablets are indicated for the treatment of chronic hepatitis B in adults and pediatric patients ≥12 years of age (weight >35 kg). Safety and efficacy in pediatric patients with chronic hepatitis B weighing less than 35 kg have not been studied. For the treatment of AIDS, it is indicated for adult patients. Data from foreign studies indicate that this drug can be used in patients aged 2-18 years within the recommended dose range. For the elderly Considering that elderly patients have decreased liver, kidney, and heart function, and are often accompanied by other diseases or use of other medications, such patients must be treated with caution when using this drug. Common adverse reactions to this drug include generalized weakness, mild to moderate gastrointestinal disturbances such as diarrhea, abdominal pain, loss of appetite, nausea, and vomiting. Tenofovir disoproxil fumarate tablets should be used in strict accordance with medical advice.