Tenofovir can be taken during pregnancy, but it should only be used if an indication exists, and can usually be stopped when the condition is under control. The medication should be taken under professional medical supervision. Tenofovir is a nucleotide reverse transcriptase inhibitor, which can be used clinically for the treatment of chronic hepatitis B, human immunodeficiency virus infection and other diseases. Typically, it is used only when clearly needed, and when the disease is under control, the doctor will adjust the treatment program and suspend the use of the drug. Although, Tenofovir is safe and pregnant women are not contraindicated, it is possible to affect the normal development of the fetus if the drug is used for a long period of time to a certain extent. Secondly, some patients may experience adverse reactions such as headache, dizziness, fever and abdominal pain after using the drug. If one is allergic to the product, one should avoid taking it. To summarize, when pregnant women experience discomfort, they should go to the hospital in time, and if necessary, strictly follow the doctor’s instructions for medication, do not self-medication.