ampicloxacillin + metronidazole

Ampicloxacillin + metronidazole is a combination drug consisting of two antibiotics with complementary mechanisms of action. Ampicloxacillin is a fixed-dose combination of ampicillin (a broad-spectrum beta-lactam antibiotic) and cloxacillin (a penicillinase-resistant penicillin), while metronidazole is a nitroimidazole antibiotic effective against anaerobic bacteria and certain protozoa. This combination is used to treat mixed infections where both aerobic Gram-positive organisms (targeted by ampicloxacillin) and anaerobic bacteria (targeted by metronidazole) are suspected, such as intra-abdominal, gynecological, dental, or diabetic foot infections. Ampicloxacillin inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins, leading to cell lysis. Metronidazole acts by entering the cells of susceptible organisms and generating free radicals that damage DNA, resulting in bacterial death. The combined use provides broad-spectrum coverage for polymicrobial infections.