Printable reference
Azithromycin seasonal dosing
Quick-reference dosing table for pediatrics with safety checks. Use local protocols and the full calculator for indication-specific dosing and edge cases.
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Verify before giving
- Confirm indication and local guideline (azithro is not first-line for many infections).
- Confirm weight (kg) and dosing day (day 1 vs days 2–5 if using a 5-day regimen).
- Check allergy history and drug interactions (macrolides).
- Review QT risk factors (congenital long QT, electrolyte abnormalities) and other QT-prolonging meds.
- Confirm formulation and concentration (mg/5 mL) if using liquid.
Typical oral dosing patterns (verify indication)
Dosing varies by indication and guideline. This is a pattern reference (mg/kg). Confirm max dose limits and local protocol.
| Regimen | Typical dose | Notes |
|---|---|---|
| 5-day regimen (common) — Day 1 | 10 mg/kg once (max per protocol) | Then Days 2–5: 5 mg/kg once daily |
| 5-day regimen (common) — Days 2–5 | 5 mg/kg once daily (max per protocol) | Total course = 5 days |
| 3-day regimen (used in some guidelines) | 10 mg/kg once daily (max per protocol) | Total course = 3 days |
If using liquid: confirm concentration (mg/5 mL) and calculate mL from mg. Round per local policy.
Safety notes (quick)
- Azithromycin can prolong QT; use caution with risk factors and other QT-prolonging meds.
- Check interactions (macrolides) and allergy history.
- Many respiratory infections are viral; confirm indication and guideline.
Red flags
Seek urgent evaluation (examples)
- Trouble breathing, persistent vomiting, or dehydration
- Severe rash, facial swelling, or breathing trouble (allergic reaction)
- Worsening symptoms despite treatment plan
Call your clinician/pharmacy (examples)
- Questions about indication, dose, max dose, or duration
- Other QT meds / heart disease / electrolyte issues
- Formulation questions (capsule/tablet/liquid concentration)
Full calculator and medication page
For indication-specific dosing details, max doses, and safety notes, use: