Breastfeeding is not recommended when taking tenofovir for hepatitis B triple positive, and it is recommended that breastfeeding take place some time after stopping the drug. Tenofovir is a kind of antiviral drug, which has a certain effect on inhibiting the replication of hepatitis B virus. Some experimental studies have proved that tenofovir is partially secreted through breast milk, so breastfeeding is not recommended for infants when women with hepatitis B teratitis III are taking tenofovir. It is safer to breastfeed an infant about 2 weeks after stopping the medication, when most of the drug residue in breast milk may have cleared. Although there is a high probability that the drug residue in breast milk will be cleared after it enters the infant’s body, it is recommended that breastfeeding be resumed after discontinuation of the drug in order to avoid the residual traces of the drug components from affecting the infant’s growth and development. For details, consult a medical professional for advice.