This study is a pilot study exploited for exploratory purposes to compare the absorption and disposition kinetics of three products containing metronidazole under fasting conditions. These products are: Metronidazole benzoate (formula A), Test product manufactured by ONE PHARMA, Greece. Flagyl 125 mg/5 ml (formula B), a Reference product manufactured by Unither Liquid Manufacturing, France and Flagyl™ 400 mg Tablets (formula C), a Reference product manufactured by Famar Health Care Services, Spain. The bioequivalence of a single 400 mg dose of products A and C, and a single 500 mg dose of product B will be assessed by comparing the pharmacokinetic parameters derived from the plasma concentration-time profiles for metronidazole.