The group is subdivided according to types of parasites.

This group comprises drugs mainly used for amoeba infections and other protozoal diseases such as giardiasis and trichomoniasis.

Nitroimidazole derivatives used for amoebiasis, trichomoniasis and giardiasis are classified in this group. Formulations for vaginal administration are classified in G01AF. Parenteral formulations mainly used for treatment of anaerobic bacterial infections are classified in J01XD. Fixed combination packages for eradication of Helicobacter pylori are classified in A02BD.
Combinations with antibacterials are classified in J01R.