Metronidazole and Tinidazole By Brian J Werth, PharmD, University of Washington School of Pharmacy Reviewed / Revised May 2022 | Modified Sep 2022 View Patient Education Pharmacokinetics Indications Contraindications Use During Pregnancy and Breastfeeding Adverse Effects Dosing Considerations More Information Topic Resources Mechanisms of Action: Nucleic... Some Clinical Uses of Metronidazo... Metronidazole is a bactericidal antibiotic.