Skønt samtidig administration af Twinrix Voksen og andre vacciner ikke er specifikt undersøgt, antages det, at hvis forskellige sprøjter og andre injektionssteder anvendes, vil der ikke observeres nogen interaktion.
Although the concomitant administration of Twinrix Adult and other vaccines has not specifically been studied, it is anticipated that, if different syringes and other injection sites are used, no interaction will be observed.