Introduction

Ornidazole has been used in trials studying the prevention of Elective Colorectal Surgery.

Uses

Ornidazole is a nitroimidazole agent indicated in the treatment of infections such as trichomoniasis, amebiasis, and giardiasis.

Associated Conditions

Amebiasis
Anaerobic Bacterial Infection
Chlamydial Infections
Gastrointestinal Infections caused by entamoeba histolytica
Giardiasis
Mixed Vaginal Infections
Surgical Site Infections
Trichomonal Vaginitis
Trichomoniasis

Dosage

Amoebiasis:

Adults: 500 mg twice a day for 5 days.
Children: 10-25 mg per kg body weight in two divided doses.

Amoebic dysentery:

Adults: 1.5 gm once a day for 3 days.
Children: 40 mg per kg body weight, once a day for 3 days.

Giardiasis:

Adults: 1.5 gm once daily for 1-2 days.
Children: 40 mg per kg body weight for 2 days.

Trichomoniasis: 1.5 gm once or 500 mg twice a day for 5 days. Sexual partner should also be treated at the same time.

Bacterial vaginosis: 3 tablets of 500 mg each as a single dose or one tablet of 500 mg once daily for 5-7 days.

Medical review

Last reviewed: 24 Jul 2026

Medically reviewed by:

This is general information, not personal medical advice. Consult a doctor before taking any medicine.