How is pediatric dosing calculated using weight, and what safety checks should be performed?

• A. Dose (mg) = weight in kg × prescribed mg/kg; verify weight, calculate accurately, and have a second clinician verify the dose
• B. Dose based on age in years; no verification
• C. Dose based on standard adult dose
• D. Use weight in pounds × prescribed mg/kg

Answer: (A)

Weight-based dosing is the standard approach for children. The dose in milligrams is found by multiplying the child’s weight in kilograms by the prescribed amount of drug per kilogram (mg/kg). Because many weights are given in pounds, you first convert to kilograms (1 kg = 2.2046 lb) and then multiply by the mg/kg. This method accounts for the child’s size and helps tailor the dose to their body surface area and metabolism. After computing, the dose should be verified with a second clinician and the weight rechecked to prevent errors. Also confirm the drug concentration and convert to the correct administration volume if needed, and consider any maximum daily limits and dosing frequency.

Dosing by age in years or using standard adult doses is inappropriate for children, and using weight in pounds without converting to kilograms can lead to miscalculation. Verification steps are essential safety checks to catch mistakes before administration.