Which practice ensures safe weight-based dosing in pediatrics?

• A. Use estimated age to determine dose.
• B. Use current weight in kg, calculate mg/kg dose, and double-check with another clinician.
• C. Administer standard adult dose.
• D. Rely on caregiver's report of weight.

Answer: (B)

In pediatric dosing, using weight-based calculations is essential because children vary widely in size and metabolism as they grow. The dose is determined in milligrams per kilogram of body weight, so obtaining the current weight in kilograms and applying the mg/kg formula ensures the amount matches the child’s size. After calculating the dose, having another clinician review it adds a safety check to catch arithmetic or transcription errors before administration. Relying on age to set doses is unreliable, since age doesn’t reliably reflect weight or drug clearance in kids. Using an adult dose for a child is unsafe, and caregiver-reported weight can be outdated or inaccurate. So, weighing the child, calculating based on mg/kg, and double-checking the calculation with another clinician provides the most reliable protection against dosing mistakes. For example, if the regimen is 10 mg/kg and the child weighs 12 kg, the dose would be 120 mg, which should be confirmed by a second clinician before giving.