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This calculator is for healthcare professional reference. Always verify calculations against approved drug references and institutional protocols. Double-check all pediatric doses.
Calculate medication doses based on patient weight (mg/kg dosing)
| Drug | Typical Dose | Frequency | Max Dose |
|---|---|---|---|
| Acetaminophen | 10-15 mg/kg | Q4-6H | 75 mg/kg/day or 4g/day |
| Ibuprofen | 5-10 mg/kg | Q6-8H | 40 mg/kg/day or 2.4g/day |
| Amoxicillin | 25-50 mg/kg/day | BID-TID | 3g/day |
| Azithromycin | 10 mg/kg day 1, 5 mg/kg days 2-5 | Daily | 500/250 mg |
| Ceftriaxone | 50-100 mg/kg | Daily | 4g/day |
| Vancomycin | 15 mg/kg | Q6H | 1g/dose |
| Gentamicin | 5-7 mg/kg | Daily | Per levels |
| Ondansetron | 0.1-0.15 mg/kg | Q8H PRN | 8 mg/dose |
* Always verify with current drug references. Doses may vary by indication, age, and renal/hepatic function.
mg/kg/dose means that dose is given each time the medication is administered. mg/kg/day is the total amount given over 24 hours, divided by the number of doses. For example, if a drug is dosed at 30 mg/kg/day divided TID, each dose would be 10 mg/kg.
Generally, pediatric doses should be capped at adult maximum doses when the calculated weight-based dose exceeds it. This typically happens in larger children and adolescents. Always verify maximum doses in current drug references.
For practical administration, doses are often rounded to convenient amounts. For liquids, round to the nearest 0.1 mL for dosing syringes or 0.5-1 mL for measuring cups. For tablets, consider available strengths. Avoid rounding that changes the dose by more than 10%.
Always convert to kilograms for dose calculations. 1 kg = 2.205 lbs, so divide pounds by 2.205 to get kilograms. Many medication errors occur due to weight unit confusion - always verify and document the unit.