The child should intake 635mg aspirin medicine per dose.
Aspirin is no longer the drug of first choice because of the increased frequency of gastric toxicity and hepatotoxicity when compared to other NSAID medications.
Calculation:
Step 1. Convert pounds to kg:
70 lb × 1 kg/7.0 lb
= 31.75 kg
Step 2. Calculate the dose in mg:
31.75 kg × 80 mg/kg/day
= 2540 mg/day
Step 3. Divide the dose by the frequency:
2540 mg/day ÷ 4 (BID)
= 635 mg/dose QID
Thus, we conclude that the child needs to intake 635 mg/dose of aspirin QID.
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