Amoxicillin Pediatric Dosage Calculator

Pediatric antibiotic regimens rely strictly on body mass rather than age. Oral regimens typically range from 15 to 90 milligrams per kilogram per day (mg/kg/day), divided into multiple doses depending on the infection. For standard oral administration, the minimum baseline is calculated as weight multiplied by 15 (minDosePO = weight * 15), while maximum parameters scale up accordingly. Liquid suspension volume is determined by dividing the calculated milligram requirement by the chosen liquid concentration strength (e.g., minDosePOmL = minDosePO / strength). Intravenous (IV) pathways use higher baseline factors like weight multiplied by 30 to account for systemic bioavailability.

Consider a child weighing 22 pounds (approximately 10 kilograms) diagnosed with acute otitis media requiring a standard oral regimen of 45 mg/kg/day split into twice-daily administration using a standard 400 mg/5 mL oral suspension. First, calculate the total daily milligram requirement: yourDose = 45 mg/kg * 10 kg = 450 mg per day. Next, determine the required liquid volume for each dose using the suspension strength. Since 400 mg/5 mL equals 80 mg/mL, dividing 450 mg by the daily frequency yields the exact milliliter measurement needed per administration, ensuring safe and precise therapeutic delivery.

Always double-check the concentration of the liquid suspension, as amoxicillin is manufactured in multiple strengths such as 200 mg/5 mL and 400 mg/5 mL. Always use an oral dosing syringe rather than household kitchen spoons to measure liquid medication accurately. Complete the full prescribed course of antibiotics even if the child's symptoms improve rapidly to prevent bacterial resistance.