Ampicillin/sulbactam is a combination of the common penicillin -derived antibiotic ampicillin and sulbactam , an inhibitor of bacterial beta-lactamase . Two different forms of the drug exist. The first, developed in 1987 and marketed in the United States under the tradename Unasyn , is an intravenous antibiotic. more

Ampicillin/sulbactam is a combination of the common penicillin -derived antibiotic ampicillin and sulbactam , an inhibitor of bacterial beta-lactamase . Two different forms of the drug exist. The first, developed in 1987 and marketed in the United States under the tradename Unasyn , is an intravenous antibiotic. The second, an oral form called sultamicillin , is marketed under the trade name Ampictam outside of the United States. Ampicillin/sulbactam is used to treat infections caused by bacteria resistant to beta-lactam antibiotics . Sulbactam blocks the enzyme which breaks down ampicillin and thereby allows ampicillin to attack and kill the bacteria. less