Den maksimale systemiske eksponering i mennesker efter kutan anvendelse af salve 1% på 200 cm2 skadet hud (Cmax = 22 ng/ ml; AUC( 0- 24) = 238 ng* h/ ml) var dog 660 gange lavere end retapamulins IC50 for Pgp- hæmning.
However, the maximum individual systemic exposure in humans following topical application of 1% ointment on 200 cm2 of abraded skin (Cmax= 22 ng/ ml; AUC(0-24) = 238 ng. h/ ml) was 660-fold lower than the retapamulin IC50 for Pgp inhibition.