Common Brands Flagyl
Drug Class
Nitroimidazole antibiotic
Controlled Substance Classification
Not a controlled medication
Generic Status
Lower-cost generic available
Prescription only
Allison Barnes, PharmD
Allison Barnes, PharmD
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Medically reviewed by Allison Barnes, PharmD last update on 20/12/2023


Metronidazole, often sold under brand names such as Flagyl, MetroCream, and Vandazole, is an antibiotic and antiprotozoal medication. It falls under the nitroimidazole class of drugs. Metronidazole works by inhibiting the growth of bacteria and parasites, thereby helping the body’s immune system to combat infections more effectively.

Historical Perspective

Metronidazole was first developed in the 1950s and has since become a critical tool in treating a wide range of infections. Its discovery and subsequent use revolutionized the field of medicine by providing a reliable treatment option for various microbial infections.

Mechanism of Action

Metronidazole exerts its antimicrobial effects by interfering with the DNA and RNA structure of bacteria and protozoa. It disrupts their ability to replicate and repair genetic material, leading to cell death and a reduction in infection severity.



Prescription only

Pregnancy & Lactation