Metronidazole API: Antimicrobial Uses and Formulation Overview

Overview of Metronidazole API

Metronidazole is a nitroimidazole antimicrobial effective against anaerobic bacteria and certain protozoa. It is used in oral, intravenous, rectal, and topical formulations to treat infections such as bacterial vaginosis, trichomoniasis, amoebiasis, and anaerobic intra‑abdominal infections.

Mechanism and Indications

Metronidazole is reduced by susceptible organisms to reactive intermediates that disrupt DNA structure and inhibit nucleic acid synthesis, leading to cell death. It is indicated for anaerobic bacterial infections, Clostridioides difficile‑associated diarrhoea (in some regimens), and protozoal diseases as per guidelines.

Quality and Handling

API quality parameters include assay, related substances, polymorphic form, and residual solvent limits. Metronidazole is light‑sensitive and should be stored in well‑closed, light‑resistant containers at controlled temperatures.