Cefadroxil-d4 (hydrate) is the deuterium labeled Cefadroxil hydrate (HY-B1190A). Cefadroxil hydrate is an orally active broad-spectrum cephalosporin antibiotic. Cefadroxil hydrate inhibits bacterial cell wall synthesis and enhances the expression of glutamate transporter-1. Cefadroxil hydrate is dependent on the intestinal peptide transporter PepT1 for small intestinal absorption. Cefadroxil hydrate 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].