Pedemy All toolsChoose the infection, then answer one question at a time. Doses are calculated for the weight entered. Tap any earlier answer to change it.
This calculator gives weight-based antibiotic choices and doses for common pediatric infections: acute otitis media, strep throat, acute bacterial sinusitis, community-acquired pneumonia, skin and soft tissue infection, bone and joint infection, and bite wounds. It is for clinicians prescribing in clinic, urgent care, the ED or the ward.
After you choose the infection, the tool asks only the questions that change the choice. For otitis media it asks about amoxicillin in the last 30 days or purulent conjunctivitis; for sinusitis it checks higher-risk features such as age under 2 years or child care attendance. Skin infections are split into cellulitis without pus or an abscess, and pneumonia, skin and bone infections are sorted into oral or IV treatment. Most pathways also ask about penicillin allergy, separating low-risk from high-risk histories, which leads to cephalosporin or non-beta-lactam alternatives.
Each result gives the first-line drug with mg/kg dosing and maximums, such as high-dose amoxicillin 90 mg/kg/day in 2 doses, plus duration, when to treat or observe, and follow-up notes. It draws on the AAP otitis media (2013) and sinusitis (2013) guidelines, IDSA strep pharyngitis (2012) and skin infection (2014) guidelines, PIDS/IDSA pneumonia (2011) and bone and joint guidance (2021, 2023), and the AAP Red Book 2024–2027.
The tool uses high-dose amoxicillin 90 mg/kg/day in 2 doses, maximum 4 g/day. If amoxicillin was taken in the last 30 days or there is purulent conjunctivitis, it switches to high-dose amoxicillin-clavulanate. Duration is 10 days under 2 years or severe, 7 days at 2–5 years, and 5–7 days from 6 years.
For a low-risk allergy history, the tool suggests cephalexin 20 mg/kg/dose twice daily for 10 days. For a high-risk history, it suggests clindamycin 7 mg/kg/dose three times daily for 10 days, or azithromycin 12 mg/kg once daily for 5 days.
The tool says incision and drainage is the main treatment and small drained abscesses may not need antibiotics. It suggests antibiotics if the abscess is over 2 cm, multiple, has surrounding cellulitis or systemic signs, or the child is under 1 year or immunocompromised, using TMP-SMX or clindamycin for MRSA cover.
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