Albendazole Dosing for a 3-Year-Old Child Weighing 11 kg
For a 3-year-old child weighing 11 kg, administer albendazole 400 mg as a single oral dose with food for common soil-transmitted helminth infections (hookworm, pinworm, ascariasis). This is the standard pediatric dose regardless of weight for these indications 1, 2.
Dosing by Indication
For Soil-Transmitted Helminths (Most Common)
- Single dose: 400 mg orally with food 1, 2
- This applies to:
- Hookworm (Ancylostoma/Necator)
- Pinworm (Enterobius vermicularis)
- Ascaris lumbricoides
- Most common intestinal parasites
The 400 mg single-dose regimen is effective regardless of the child being below the typical 15 kg threshold, as this is the standard pediatric dose for these infections 1, 2.
For More Complex Infections (Weight-Based Dosing)
If treating microsporidiosis, neurocysticercosis, or hydatid disease, weight-based dosing applies:
- 7.5 mg/kg orally twice daily (maximum 400 mg per dose) 3, 4, 3, 4
- For this 11 kg child: approximately 82.5 mg twice daily
- Duration varies by condition:
- Microsporidiosis: Until immune reconstitution
- Neurocysticercosis: 8-30 days (typically 10-14 days) 5
- These conditions require specialist consultation
Critical Administration Details
Always give albendazole with food 6. The FDA drug label emphasizes that oral bioavailability increases up to 5-fold when administered with a fatty meal (approximately 40 grams of fat content). This significantly enhances absorption and therapeutic efficacy 6.
Tablet administration options 6:
- Tablets may be crushed or chewed and swallowed with water
- This is particularly important for young children who cannot swallow tablets whole
- Mix with food if needed to improve palatability
Common Pitfalls to Avoid
Do not give on an empty stomach - absorption is dramatically reduced without food 6
Do not underdose based on weight alone - for common soil-transmitted helminths, 400 mg is the standard single dose even in children under 15 kg 1, 2
Consider repeat dosing - for certain infections like trichuriasis (whipworm), efficacy is lower and repeat treatment may be needed 2. The UK guidelines suggest empirical retreatment at 8 weeks for possible residual schistosomiasis if that is a concern 2
Combination therapy consideration - the most recent UK guidelines (2025) recommend combining albendazole 400 mg with ivermectin 200 μg/kg as empirical treatment for asymptomatic eosinophilia in children >24 months when stool microscopy is negative 2. However, this requires excluding Loa loa exposure first.
Duration and Follow-Up
- Single-dose therapy is standard for most common intestinal helminths 1, 2
- Repeat at 2 weeks for Enterobius (pinworm) to address reinfection 1
- For persistent infections or high-burden areas, consider repeat treatment after 1 month 2
The evidence strongly supports that single-dose albendazole 400 mg achieves cure rates of 92-98% for Ascaris, 63-92% for hookworm, but only 5-6% for Trichuris 7, 8, 9, 10, 11. This low efficacy against whipworm is a known limitation requiring either repeat dosing or alternative agents 2.