Omeprazole Pediatric Dose Calculator
Age-based omeprazole dosing for children, with maximum doses, age limits and sources. Enter age and weight for the dose in mg and syrup mL or capsules.
Pediatric dosing
GERD / oesophagitis / peptic disease
Omeprazole dose chart by age and weight
GERD / oesophagitis / peptic disease. Weights are WHO/IAP reference medians for age — always dose on the measured weight.
| Age | Weight | Dose (mg) | Oral suspension 2 mg/mL (10 mg/5 mL, where available) | Frequency |
|---|---|---|---|---|
| 1 year | 9.3 kg | 5 mg | 2.5 mL | Once daily, 30–60 minutes before breakfast |
| 18 months | 10.6 kg | 10 mg | 5 mL | Once daily, 30–60 minutes before breakfast |
| 2 years | 11.8 kg | 10 mg | 5 mL | Once daily, 30–60 minutes before breakfast |
| 3 years | 14.1 kg | 10 mg | 5 mL | Once daily, 30–60 minutes before breakfast |
| 4 years | 16.2 kg | 10 mg | 5 mL | Once daily, 30–60 minutes before breakfast |
| 5 years | 17.5 kg | 10 mg | 5 mL | Once daily, 30–60 minutes before breakfast |
| 6 years | 19 kg | 10 mg | 5 mL | Once daily, 30–60 minutes before breakfast |
| 8 years | 24.4 kg | 20 mg | 10 mL | Once daily, 30–60 minutes before breakfast |
| 10 years | 31.1 kg | 20 mg | 10 mL | Once daily, 30–60 minutes before breakfast |
| 12 years | 39.4 kg | 20 mg | 10 mL | Once daily, 30–60 minutes before breakfast |
Strengths in the calculator
- Oral suspension 2 mg/mL (10 mg/5 mL, where available) (Oral)
- Capsule 10 mg (gastro-resistant pellets) (Oral)
- Capsule 20 mg (gastro-resistant pellets) (Oral)
- Capsule 40 mg (gastro-resistant pellets) (Oral)
Different strength on your bottle? Use “Different strength on the bottle?” under the result.
Safety
Pregnancy and breastfeeding
Legacy FDA category C. Large cohort data are reassuring; use if needed.
Compatible with breastfeeding.
Clinical notes
Capsules may be opened and the pellets mixed with yoghurt or fruit juice — do not crush or chew the pellets. Exclude red flags (haematemesis, weight loss, dysphagia) before long courses.
Adult and adolescent (≥40 kg) dose
20–40 mg — Once daily before breakfast (max 40 mg per dose, 40 mg per day).
Other names and brands
- India: Omez
- USA: Prilosec
- UK: Losec
Brand examples only — products and strengths vary by country. Always check the label.
Frequently asked questions
What is the omeprazole dose for children?
GERD / oesophagitis / peptic disease: <10 kg: 5 mg per dose · once daily, 30–60 minutes before breakfast; 10 to <20 kg: 10 mg per dose · once daily, 30–60 minutes before breakfast; ≥20 kg: 20 mg per dose · once daily, 30–60 minutes before breakfast. Usual duration: 4–8 weeks. Always use the child's measured weight and check the strength on the bottle.
How many mL of oral suspension 2 mg/mL (10 mg/5 mL, where available) for an 11.8 kg child?
For GERD / oesophagitis / peptic disease, an 11.8 kg child (about 2 years) needs 10 mg per dose — 5 mL of Oral suspension 2 mg/mL (10 mg/5 mL, where available), once daily, 30–60 minutes before breakfast. Recalculate with the child's actual weight.
From what age can omeprazole be given?
Age range in PediaRx: ≥1 year – adult. The calculator does not calculate a dose below 1 year. Each indication can have its own age and weight limits, shown with its regimen.
Is omeprazole safe in pregnancy?
Legacy FDA category C. Large cohort data are reassuring; use if needed.
Sources and editorial process
- Omeprazole — US prescribing information (paediatric GERD weight bands) — DailyMed (U.S. National Library of Medicine)
- BNF for Children — Omeprazole — NICE / BMJ Group / Royal Pharmaceutical Society
Dosing data last updated 2026-09-27. PediaRx is built and maintained by Dr. Shounak Pal, MBBS (Medical Officer, Government of West Bengal, India — founder and developer of PediaRx). Every regimen is encoded with explicit units, maximum doses and age/weight limits and is checked by automated tests before publication. Report an error: hello@pediarx.com.
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Clinical disclaimer: reference tool for qualified health professionals. Verify every dose against current guidance and the product label before prescribing.
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