TAF is Tenofovir Tenofovir Fumarate Tablets, an antiviral medication that is used by a small number of patients who experience weight loss, which usually does not require treatment if it is not particularly severe and improves when the medication is stopped. It is used to treat chronic hepatitis B (HBV) in adults and adolescents (12 years of age and older, weighing at least 35 kg). Hypersensitivity to the active ingredient or any of the following listed excipients: alpha lactose, microcrystalline cellulose, cross-linked sodium carboxymethylcellulose, magnesium stearate, polyvinyl alcohol, titanium dioxide, polyethylene glycol, talc, and iron oxide yellow is prohibited. Tenofovir disoproxil fumarate tablets can cause common gastrointestinal adverse reactions such as diarrhea, vomiting, and nausea, which can lead to weight loss, and common systemic disorders such as fatigue. If you lose a lot of weight after taking tenofovir disoproxil fumarate tablets, you need to seek medical attention to find out why. The medication must be carried out in accordance with the doctor’s instructions.