Interactions with other vaccines and other forms of interactions: Hepatitis B vaccine can be administered safely and effectively at the same time as BCG, DTP, measles, polio (OPV or IPV), Haemophilus influenzae type b, or yellow fever vaccines that are extensively used in the Expanded Programme on Immunization (EPI), worldwide or vitamin A supplementation. If hepatitis B vaccine is given at the same time as other vaccines, it should be administered at a separate site. It should not be mixed in the vial or syringe with any other vaccine unless it is licensed for use as a combined product (e.g. DTP Hep B/DTP Hep B-Hib).