What is the primary use of metronidazole?

Metronidazole is primarily used for treating parasitic infections, particularly those caused by protozoa such as Giardia lamblia, Entamoeba histolytica, and Trichomonas vaginalis. This antibiotic agent exhibits both antibacterial and antiparasitic properties. Its effectiveness against anaerobic bacteria, such as Bacteroides species and certain strains of Clostridium, also makes it useful in mixed infections where anaerobes might be involved.

While metronidazole can be used in certain bacterial infections, its primary indication in clinical practice is for infections caused by parasites. In the context of treating conditions like bacterial vaginosis and some perioral infections associated with anaerobic bacteria, it is indeed a common choice, but its broader application lies in its antiparasitic effects. Therefore, recognizing its primary use as an agent against parasitic infections is key to understanding its role in treatment protocols.