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Open Dose Calculator →Aciclovir (Acyclovir)
Aciclovir (Acyclovir)
💊 Used for: Neonatal HSV (10 mg/kg IV q8h x 14-21d); HSV encephalitis (10 mg/kg IV q8h x 21d); varicella immunocompetent (80 mg/kg/d q6h x 5d); herpes zoster immunocompromised (80 mg/kg/d q8h x 7-10d)
Formulation
Tablet
Standard tablet
Dose Range
10–80 mg/kg
Max Daily
N/A
Frequency
As directed
Max Single
800 mg
Route: IV, oral, topical
Dose by Child Weight
Based on formulation: Standard tablet
| Child's Weight | Dose (mg) | Dose (ml) | Max Daily Dose (mg) |
|---|---|---|---|
| 5 kg | 50–400 mg | 50.0–400.0 ml | — |
| 6 kg | 60–480 mg | 60.0–480.0 ml | — |
| 7 kg | 70–560 mg | 70.0–560.0 ml | — |
| 8 kg | 80–640 mg | 80.0–640.0 ml | — |
| 9 kg | 90–720 mg | 90.0–720.0 ml | — |
| 10 kg | 100–800 mg | 100.0–800.0 ml | — |
| 12 kg | 120–960 mg | 120.0–960.0 ml | — |
| 15 kg | 150–1200 mg | 150.0–1200.0 ml | — |
| 18 kg | 180–1440 mg | 180.0–1440.0 ml | — |
| 20 kg | 200–1600 mg | 200.0–1600.0 ml | — |
| 25 kg | 250–2000 mg | 250.0–2000.0 ml | — |
| 30 kg | 300–2400 mg | 300.0–2400.0 ml | — |
* Always verify with your doctor. doses are approximate and may vary based on condition and formulation.
⚠️ Important Warnings
- •Renal toxicity if rapid IV; give over 1 hour; for varicella within 24h of rash onset; not indicated <2 yr for varicella
💡 Use the DoseCare Calculator for interactive dose calculations tailored to your child's exact weight and formulation.
DoseCare is a decision support tool only. Always verify doses with a qualified healthcare provider.