A 20 kg child requires antibiotic 6 mg/kg/day divided every 12 hours. What is the per-dose dose?

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Study for the Archer Pharmacology Test to master dosage calculations and medication administration. Use flashcards and multiple choice questions with detailed explanations. Get ready for your exam!

Multiple Choice

A 20 kg child requires antibiotic 6 mg/kg/day divided every 12 hours. What is the per-dose dose?

Explanation:
Start with how much drug is needed each day based on weight. Multiply the dose (6 mg per kg per day) by the child’s weight (20 kg) to get the total daily amount: 6 × 20 = 120 mg per day. Since the dose is divided every 12 hours, you give two doses each day. Split the total daily amount into two equal parts: 120 mg ÷ 2 = 60 mg per dose. So each administration should be 60 mg to deliver 120 mg over the day. The other numbers wouldn’t sum to the correct total daily dose when given in two equal doses.

Start with how much drug is needed each day based on weight. Multiply the dose (6 mg per kg per day) by the child’s weight (20 kg) to get the total daily amount: 6 × 20 = 120 mg per day. Since the dose is divided every 12 hours, you give two doses each day. Split the total daily amount into two equal parts: 120 mg ÷ 2 = 60 mg per dose. So each administration should be 60 mg to deliver 120 mg over the day. The other numbers wouldn’t sum to the correct total daily dose when given in two equal doses.

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