amoxicillin , cephalexin , and cefadroxil were given orally , and peak milk concentrations averaged 0.81 +/- 0.33 microgram/ml at 5 hours , 0.50 +/- 0.23 microgram/ml at 4 hours , and 1.64 +/- 0.73 microgram/ml at 6 hours , respectively .
C0007716
cephalexin
C0007538
cefadroxil