My sister is still taking hepatitis B virus inhibitor (Ternofortit) but since the pregnancy, she has stopped taking it. Now, after giving birth, if I want to drink again, do I need to have a blood test before taking it or can I still drink it as before? The doctor asked me to use Ternofortit while breastfeeding? Will the medicine have any effect on the baby since you are still breastfeeding? I thank you doctor.