A moderate-spectrum, bacteriolytic beta-lactam antibiotic C₁₆H₁₉N₃O₅S closely related to ampicillin and with similar properties, but more readily absorbed when taken orally. It is used to treat bacterial infections caused by susceptible microorganisms.
Any of a group of antibiotic drugs structurally related to sulphonamide, tending to be bacteriostatic rather than bacteriocidal.