Diloxanide Furoate Dosing
For adults, diloxanide furoate should be dosed at 500 mg orally three times daily for 10 days, and for children, the dose is 20 mg/kg/day divided into three doses for 10 days 1.
Adult Dosing
The standard adult dose is 500 mg orally three times daily (TDS) for 10 days 1. This dosing has been validated in multiple clinical contexts:
- Post-invasive disease treatment: After completing treatment for amoebic liver abscess with metronidazole or tinidazole, all patients should receive diloxanide furoate as a luminal amoebicide to reduce relapse risk, even if stool microscopy is negative 1
- Asymptomatic carriage: Studies demonstrate parasitological cure rates of 88-93% in asymptomatic patients with this regimen 2
Pediatric Dosing
For children, the dose is 20 mg/kg/day divided into three doses for 10 days (maximum 500 mg per dose) 1, 3.
Clinical Context and Rationale
Diloxanide furoate serves as the luminal amoebicide of choice for eliminating intestinal cysts of Entamoeba histolytica. The drug achieves high luminal concentrations in its ester form, making it more effective than metronidazole for treating asymptomatic intestinal infection 4.
Key Treatment Principles:
Always use after tissue-invasive disease: Following treatment of amoebic liver abscess with metronidazole (500 mg TDS for 7-10 days) or tinidazole (2 g daily for 3 days), diloxanide furoate must be administered to eradicate intestinal colonization 1
Alternative luminal agent: Paromomycin (30 mg/kg/day in 3 divided doses for 10 days) can be used if diloxanide furoate is unavailable 1
Duration is critical: The full 10-day course is necessary to achieve optimal parasitic clearance rates of 81-96% 4
Common Pitfalls:
- Do not skip luminal therapy: Even with negative stool microscopy after treating invasive disease, luminal amoebicide therapy is essential to prevent relapse 1
- Inadequate for invasive disease alone: Diloxanide furoate is ineffective as monotherapy for tissue-invasive amoebiasis and must be combined with metronidazole or tinidazole 3
- Adverse effects: Monitor for flatulence, anorexia, headache, and urticaria, though these are generally mild 4
Combination Therapy:
When treating both invasive and intestinal disease, combination formulations containing diloxanide furoate 500 mg and metronidazole 400 mg taken three times daily for 5 days have shown 100% parasitic clearance 5. However, for amoebic liver abscess, the guideline-recommended approach is sequential therapy: complete the metronidazole/tinidazole course first, then administer diloxanide furoate 1.