Detailed Description Cefpodoxime, Free Acid, is a third-generation cephalosporin β-lactam antibiotic and a metabolite of Cefpodoxime Proxetil. Cefpodoxime, Free Acid, is soluble in DMSO. We also offer: Cefpodoxime Sodium (C096) Cefpodoxime Proxetil (C015)