Medscape - Amebiasis-specific dosing for Flagyl, Flagyl ER (metronidazole )Loading dose: 15 mg/kg IV; not to exceed 4 g/day. Maintenance dose: 7.5 mg/kg PO/IV (over 1 h) q6hr x 7-10Use of disulfiram within past 2 weeks; use of alcohol during therapy or within 3 days of discontinuing therapy....