Amoebiasis
Adult: 1 g bid for 5-10 days.
Oral
Giardiasis
Adult: 500 mg bid for 5-7 days.
Oral
Trichomoniasis
Adult: 2 g as a single dose. Alternatively, 1 g every 12 hr for 3 doses or 250 mg tid for 5-7 days. Sexual partners should be treated concomitantly.
Oral
Acute ulcerative gingivitis
Adult: 500 mg bid for 2 days.