erythromycin plasma concentrations were determined in twenty subjects after a single dose , immediately before food , of erythromycin , 500 mg. as : ( 1 ) erythromycin stearate ( erythrocin , 500 mg , ovaloid tablets ) , and ( 2 ) erythromycin base ( eryc , 250 mg , capsules containing enteric-coated pellets ) .
C0059566
erythromycin stearate
C0014806
erythromycin base