Women in early pregnancy can take Tenofovir if necessary. Tenofovir is an antiviral drug and is anti-hepatitis B virus and can be used to treat chronic hepatitis B in adults as well as adolescents. For women, if an individual is suffering from chronic hepatitis B before or during pregnancy, tenofovir can be taken as an antiviral treatment during early pregnancy under the supervision of a physician. Although there is limited data on the use of tenofovir in pregnant women, there are no malformations or fetal toxicity associated with tenofovir in the large body of data on the use of tenofovir in pregnant women, so women in early pregnancy can take the drug if necessary. ADVERSE REACTIONS: Tenofovir application may cause adverse reactions such as headache, dizziness, arthralgia, diarrhea, and abdominal pain. Contraindications: hypersensitivity to any of the ingredients contained in tenofovir is contraindicated. Precautions: It is not recommended to discontinue treatment in patients with progressive or cirrhotic liver disease, which may pose a fatal risk. If you need to use tenofovir or other drugs in early pregnancy, you must strictly follow the doctor’s instructions to use the drug, and should never use the drug on your own.