polyantibiotic

pol·y·an·ti·bi·ot·ic

(polē-antē-bī-otik)
Combination of two or more antibiotics.
References in periodicals archive ?
(21) found that an attachable subcutaneous cuff containing silver ions inserted after local application of polyantibiotic ointment conferred a protective effect on catheters, resulting in lower rates of contamination.