Clarithromycin Pediatric Dosage Calculator
Macrolide antibiotic dosing for AOM, strep pharyngitis, pertussis, and atypical infections in children.
Weight in kilograms (minimum 6 months)
Infection being treated
⚠️ Warnings & Contraindications
- May prolong QT interval; avoid with other QT-prolonging drugs
- Suspension has better bioavailability than tablets in children
- Can cause taste disturbance (bitter aftertaste)
- Drug interactions via CYP3A4 inhibition (increases levels of many drugs)
- For pertussis, treat within 3 weeks of cough onset for microbiological clearance
- Not first-line for AOM; reserve for penicillin-allergic patients
ℹ️ Clinical Notes
Suspension: 125mg/5mL, 250mg/5mL. Tablets: 250 mg, 500 mg. Can be taken with food to reduce GI upset. For H. pylori, used in combination with amoxicillin and PPI.
References
- Clarithromycin for children - PMC - PMC (2012)
- Clarithromycin Dosage Guide - Drugs.com (2025)
- WikEM Clarithromycin - WikEM (2026)
Medical Disclaimer
This calculator is provided for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or calculated using this tool.
The authors and publishers of this calculator make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability, or availability of the information, products, services, or related graphics contained within this tool for any purpose.