using a microbiological and a fluorimetric assay to determine penetration of erythromycin into vaginal fluids , concentrations were measured in plasma from nine men one hour after a single oral dose of erythromycin stearate 2 g and in vaginal washings and plasma samples taken simultaneously from 11 women two hours after the last dose of a 10-day course of erythromycin stearate ( 250 mg four times daily ) .
C0014806
erythromycin
C0059566
erythromycin stearate