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Open Dose Calculator →Acyclovir
Acyclovir
💊 Used for: Herpes simplex, varicella-zoster
Formulation
Suspension
200mg/5ml
Dose Range
15–30 mg/kg
Max Daily
60 mg/kg
Frequency
Every 8 hours (3 times daily)
Max Single
800 mg
Route: Oral
Dose by Child Weight
Based on formulation: 200mg/5ml
| Child's Weight | Dose (mg) | Dose (ml) | Max Daily Dose (mg) |
|---|---|---|---|
| 5 kg | 75–150 mg | 1.9–3.8 ml | ≤ 300 mg |
| 6 kg | 90–180 mg | 2.3–4.5 ml | ≤ 360 mg |
| 7 kg | 105–210 mg | 2.6–5.3 ml | ≤ 420 mg |
| 8 kg | 120–240 mg | 3.0–6.0 ml | ≤ 480 mg |
| 9 kg | 135–270 mg | 3.4–6.8 ml | ≤ 540 mg |
| 10 kg | 150–300 mg | 3.8–7.5 ml | ≤ 600 mg |
| 12 kg | 180–360 mg | 4.5–9.0 ml | ≤ 720 mg |
| 15 kg | 225–450 mg | 5.6–11.3 ml | ≤ 900 mg |
| 18 kg | 270–540 mg | 6.8–13.5 ml | ≤ 1080 mg |
| 20 kg | 300–600 mg | 7.5–15.0 ml | ≤ 1200 mg |
| 25 kg | 375–750 mg | 9.4–18.8 ml | ≤ 1500 mg |
| 30 kg | 450–900 mg | 11.3–22.5 ml | ≤ 1800 mg |
* Always verify with your doctor. doses are approximate and may vary based on condition and formulation.
⚠️ Important Warnings
- •Start early in disease course
- •Adequate hydration required
- •Monitor renal function
Possible Side Effects
- •Nausea, vomiting, diarrhea
- •Headache, dizziness
- •Renal impairment (high dose IV)
- •Neurotoxicity (lethargy, confusion)
- •Local reactions at injection site
- •Rare: encephalopathy
💡 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.