Omeprazole Pediatric Dose Calculator

Estimate omeprazole pediatric dose by weight (mg/kg) and convert to practical liquid or capsule dosing plans.

Weight (in lbs)

Enter the patient weight in the selected unit.

Weight Unit

Select the unit used for the patient weight.

Medication

Select a medication from your visible list.

Strength

Select the strength of Omeprazole

Frequency (1 time per day)

Select how many doses are prescribed per day.

Course: 28 days

Select the prescribed course length in days.

Dosage Amount: 1 mg/kg/day (1 to 16 years (GERD / erosive esophagitis))

Choose the dose written on the prescription. These options are not a recommendation for your child.

Label dosing is by weight band, once daily: 1–16 y 5–under 10 kg 5 mg, 10–under 20 kg 10 mg, 20 kg and up 20 mg; 1 mo–under 1 y (erosive esophagitis only) 3–under 5 kg 2.5 mg, 5–under 10 kg 5 mg, 10 kg and up 10 mg.
Not established under 1 month or for pediatric H. pylori (label).
Packets (2.5 mg, 10 mg) must be mixed whole with 5 or 15 mL water and taken within 30 min — they are not a stock liquid for measuring partial mL doses.
Konvomep 2 mg/mL is labeled adults only and has a high sodium content.

By using the "Calculate Dose" button on pedscalc.com, you acknowledge and agree that while our calculations aim for accuracy, final prescription responsibility lies solely with you, the healthcare provider. pedscalc.com and its operators are not liable for any errors or omissions, or for the results obtained from the use of this information. Always verify calculations and exercise professional judgment.

dose calculator basics

Omeprazole pediatric dose calculator details

Use this Omeprazole calculator as the fast parent page for weight-based dose checks, mL conversion, common strengths, and the practical safety steps that generic calculator sites often skip.

Formula

mL per dose = (child weight in kg x prescribed mg/kg/day / doses per day) / medication concentration in mg per mL.

Worked example

For a 20 kg child using 1 mg/kg/day divided 1 time daily with 2 mg/1 mL, calculate the daily mg target, divide by the schedule, then convert that mg amount into mL for the selected product.

Use case

Dosing focus

Practical check

Weight-based dose check

Common calculator choices include 1 mg/kg/day or mg/kg targets depending on the prescription.

Confirm the prescription's dose basis before trusting any mL result.

Strength conversion

Common strengths on this page include 2 mg/1 mL, 4 mg/1 mL.

The same mg target creates a different mL dose when the bottle or tablet strength changes.

Schedule and course

Available schedules include 1 time daily, with course options shown in the calculator.

Match the frequency and duration to the clinician's plan rather than choosing the easiest volume.

Safety checks before using the result

Use the exact product strength in hand before measuring the dose.
Confirm maximum dose, age limits, and indication-specific cautions when they apply.
Escalate urgent symptoms or medication reactions instead of repeating doses from calculator output alone.

Practical dosing guide

Before you measure the dose

Use this page to match the prescribed omeprazole dose to the form the child can actually take and the timing needed before meals.

GERD or reflux symptoms: Many pediatric omeprazole plans are once daily before breakfast, then reassessed after the short treatment window to see whether ongoing acid suppression is still needed.
Esophagitis or higher-acid burden: More severe disease may need closer follow-up, a more formal treatment course, or a clinician-directed change in schedule rather than casual dose escalation at home.
Formulation choice: Choose the formulation first: compounded suspension, delayed-release packet or granules, opened capsule on soft food, or swallowed capsule/tablet.

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Omeprazole pediatric medication summary

Omeprazole is a proton pump inhibitor (PPI) used in children for GERD and erosive esophagitis. Use the pediatric dose calculator to estimate omeprazole mg/kg dosing, convert to a practical formulation, and plan pre-meal timing.

Typical pediatric courses run 4–8 weeks; extend only when objective evidence of ongoing inflammation exists.

Administer on an empty stomach 30–60 minutes before a meal to ensure maximal proton pump binding.

Omeprazole indications and common pediatric uses

Omeprazole provides durable acid suppression for children with erosive esophagitis, chronic GERD symptoms, or selected acid-mediated conditions.

Erosive esophagitis secondary to GERD

Erosive esophagitis secondary to GERD: Plan maintenance therapy only if symptoms recur after taper.

Symptomatic gastroesophageal reflux disease

Symptomatic gastroesophageal reflux disease: Consider functional heartburn or anxiety if no response.

Eosinophilic esophagitis (PPI-responsive phenotype)

Eosinophilic esophagitis (PPI-responsive phenotype): Define the biopsy plan before therapy starts.

Prevention of NSAID-related gastric injury in high-risk patients

Prevention of NSAID-related gastric injury in high-risk patients: Coordinate with primary teams for pain management alternatives.

Functional dyspepsia with suspected acid hypersensitivity

Functional dyspepsia with suspected acid hypersensitivity: Use a defined stop date.

How to give Omeprazole

Parent‑friendly guide for pediatric omeprazole dosing.
Measure liquid with an oral syringe. If using capsules, open and sprinkle granules on applesauce or soft food; swallow without chewing. Give 30 minutes before meals.
Set a morning reminder; align dosing with breakfast; avoid crushing granules.

Omeprazole side effects, contraindications, and interactions

Omeprazole is usually well tolerated. Mild headache, abdominal discomfort, and loose stools are the most common complaints. Chronic therapy carries additional nutritional and infectious risks that require anticipatory guidance. Most side effects are mild and temporary. Keep your child hydrated, use the medicine exactly as prescribed, and call your pediatrician for red-flag symptoms like trouble breathing, severe rash or swelling, persistent vomiting, signs of dehydration, or blood in stool.

Common side effects

Call urgently for watery diarrhea with fever or blood—PPIs can predispose to Clostridioides difficile infection
Discuss any new supplements or medicines; omeprazole alters absorption of vitamin B12, magnesium, and some drugs
Recheck the treatment plan every 2–3 months for chronic users to limit long-term risks

Safety checks

Severe hepatic impairment: Reduced clearance increases exposure.
Hypomagnesemia risk or diuretic use: PPIs can lower magnesium with long-term use.
Severe abdominal pain with bloody stool: Possible C. difficile or GI bleeding.
New rash with swelling or breathing difficulty: Possible hypersensitivity reaction.

Drug interactions

Review the full medication list with a clinician or pharmacist before combining therapies.

Omeprazole mechanism and clinical pearls

Omeprazole is a prodrug that becomes active only in the acidic canaliculi of gastric parietal cells, where it locks the proton pump in the "off" position until new pumps are built.

Give 30-60 minutes before the first meal so proton pumps are active when drug reaches circulation. In BID plans, keep the second dose before dinner, not at bedtime.

For capsule-opening strategies, sprinkle beads onto soft acidic-compatible food and swallow without chewing to preserve enteric protection.

Recheck for clopidogrel, HIV therapies, warfarin, methotrexate, and pH-dependent drugs at each follow-up because risk profiles shift as regimens change.

If adherence and timing are correct but symptoms persist, reassess diagnosis, interaction burden, and potential CYP2C19 variability before reflex dose escalation.

Frequently asked questions about Omeprazole

Proton pumps need to be activated by food to bind omeprazole. Dosing before breakfast (and dinner if twice daily) ensures active pumps and stronger acid suppression.

Most GERD plans use 6–8 weeks followed by reassessment. Long-term therapy is reserved for severe disease and should include periodic lab checks and a taper discussion.

Stopping suddenly can trigger rebound acid hypersecretion. Work with your clinician on a taper such as every-other-day dosing for one week, then discontinue.

Give it as soon as you remember that same day before a meal. If it is almost time for the next dose, skip the missed dose and resume the schedule—never double up.

Chronic use can reduce absorption of vitamin B12, magnesium, and iron. Your clinician may order labs yearly if therapy continues beyond 3 months and will suggest supplements if needed.

Call right away for watery or bloody diarrhea, severe stomach pain, rash with swelling, or muscle cramps/palpitations that may signal low magnesium.

Omeprazole dosing is weight-based and usually given once daily. Use the calculator with your clinician's mg/kg target to convert to mL or capsule strength.

Start with the prescribed mg/kg target, then use the calculator to convert that into the specific liquid, packet, capsule, or tablet form your child is using. Timing still matters, so give the dose before a meal unless your clinician told you otherwise.

Sources reviewed for Omeprazole

dailymed-omeprazole-2024
naspghan-gerd-2023
jaci-eoe-2022
peds-nsaid-2023
jgh-dyspepsia-2023
Omeprazole Prescribing Information
DailyMed
Source

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