Amoxicillin Dose Calculator
for Children
Calculate practical paediatric oral amoxicillin doses by indication using Malaysia’s National Antimicrobial Guideline.
Oral amoxicillin
Infant younger than 3 months
The NAG outpatient community-acquired pneumonia regimen shown on this page is for infants aged 3 months and older and children.
Use age-appropriate young-infant assessment and antimicrobial guidance instead.
Common paediatric amoxicillin regimens
Malaysia National Antimicrobial Guideline 2024.
| Indication | Dose | Frequency | Duration |
|---|---|---|---|
| GAS tonsillitis / pharyngitis | 50 mg/kg/day Max 1 g/day |
OD or BD | 10 days |
| Acute bacterial rhinosinusitis | 80–90 mg/kg/day Max 2 g/day |
BD | 5 days |
| Acute otitis media | 80–90 mg/kg/day Max 1 g/dose, 3 g/day |
BD–TDS |
<2 y: 7–10 days ≥2 y: 5–7 days |
| Outpatient CAP ≥3 months |
80–90 mg/kg/day Max 1 g/dose, 3 g/day |
BD–TDS | 5 days |
For the calculator, SetelDoc uses 90 mg/kg/day for high-dose regimens and displays them as BD for a concise practical prescription. Tonsillitis/pharyngitis uses 50 mg/kg/day displayed as BD.
Paediatric Dose Calculator Demo
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Important prescribing points
Amoxicillin paediatric-dose FAQ
What is the amoxicillin dose for acute otitis media?
Malaysia’s NAG recommends 80–90 mg/kg/day orally in 2–3 divided doses, with a maximum of 1 g per dose. Duration is 7–10 days below age 2 years and 5–7 days above age 2 years.
What is the amoxicillin dose for acute bacterial sinusitis?
NAG recommends 80–90 mg/kg/day orally in 2 divided doses for 5 days, with a maximum of 2 g/day.
What is the amoxicillin dose for Group A streptococcal pharyngitis?
NAG recommends 50 mg/kg/day orally in 1 or 2 divided doses, maximum 1 g/day, for a total of 10 days.
What is the outpatient amoxicillin dose for paediatric pneumonia?
For infants aged 3 months and older and children with outpatient community-acquired pneumonia where bacterial treatment is indicated, NAG recommends high-dose amoxicillin 80–90 mg/kg/day in 2–3 divided doses for 5 days, with maximum 1 g/dose and 3 g/day.
Which amoxicillin liquid concentrations are included?
This calculator includes 125 mg/5 mL and 250 mg/5 mL, both of which are listed in the current Ministry of Health Drug Formulary.
Clinical references
- Ministry of Health Malaysia — National Antimicrobial Guideline 2024: Paediatric Otorhinolaryngology Infections — tonsillitis/pharyngitis, rhinosinusitis and acute otitis media.
- Ministry of Health Malaysia — National Antimicrobial Guideline 2024: Paediatric Respiratory Infections — outpatient community-acquired pneumonia.
- Ministry of Health Malaysia — FUKKM: Amoxicillin — current amoxicillin formulations and general formulary dosing.
For healthcare professionals. This calculator supports but does not replace clinical judgement. Confirm bacterial indication, age, weight, allergy history, renal function, formulation and current antimicrobial guidance before prescribing.