Cefadroxil-13C6 (BL-S 578-13C6) is 13C labeled Cefadroxil (HY-B1190). Cefadroxil is an orally active broad-spectrum cephalosporin antibiotic. Cefadroxil inhibits bacterial cell wall synthesis and enhances the expression of glutamate transporter-1. Cefadroxil is dependent on the intestinal peptide transporter PepT1 for small intestinal absorption. Cefadroxil has inhibitory and bactericidal activity against a variety of Gram-positive and Gram-negative bacteria and has analgesic effects on neuropathic pain[1][2][3][4][5][6][7][8].