Tenofovir should be tenofovir fumarate tablets, and the correct way to take it is 1 tablet once a day, as directed by your doctor. Tenofovir Fumarate Tablet instructions state that this product should be taken 1 tablet each time, once daily, by mouth. The drug needs to be taken with food. There is no need to adjust the dose for people with liver impairment and the elderly. Tenofovir disoproxil fumarate tablets are indicated for the treatment of patients aged 12 years and older with chronic hepatitis B who weigh at least 35 kg. Adverse reactions can be seen as headache, nausea, and fatigue. This product is contraindicated in cases where the drug is hypersensitive to the active ingredient or the following excipients (microcrystalline cellulose, X lactose, magnesium stearate, cross-linked sodium carboxymethylcellulose, polyethylene glycol, polyvinyl alcohol, titanium dioxide, talcum powder, iron oxide yellow). The drug should be used under medical supervision.