The healthcare provider has ordered ampicillin 400mg IV Q12h. The child's weight is 20 lb. The recommended safe dose range is 50-100 mg/kg/day. Is the dosage safe? Write yes or no.

Step 1: Convert weight to kg 20 ÷ 2.2 = 9.1 kg (approx). Step 2: Safe daily dose range 50–100 mg/kg/day × 9.1 = 455–910 mg/day. Step 3: Ordered dose 400 mg every 12 hr = 800 mg/day. Step 4: Compare 800 mg/day is within 455–910 mg/day.