Chapter 42: Pediatric Medication Administration and Calculations

Oral medication administration in children demands attention to formulation preferences, as most pediatric patients receive liquids, suspensions, or chewable tablets rather than solid pills, alongside techniques that prevent aspiration and maintain medication efficacy such as keeping children upright during administration and ensuring thorough mixing of suspensions before each dose. The chapter stresses that immature hepatic and renal systems in infants and newborns significantly delay drug metabolism and clearance, necessitating careful monitoring for toxicity and adjusted dosing intervals. For parenteral routes, the vastus lateralis muscle is identified as the optimal injection site in infants, with specific needle gauges and lengths recommended to minimize tissue trauma while ensuring accurate drug delivery. Intravenous administration in pediatrics requires specialized equipment including microdrip burettes calibrated to sixty drops per milliliter to achieve precise volume control with the small fluid volumes appropriate for children, and nurses must meticulously account for flush volumes in total daily fluid intake to prevent dangerous fluid overload. Dosage calculations rely on two primary methods: weight-based dosing using kilogram-to-pound conversions with medications expressed as milligrams per kilogram, and body surface area calculations when only adult doses are available, employing the formula that multiplies the child's body surface area ratio by the adult dose. Throughout medication administration, nurses must adapt their approach to match the child's developmental stage, from quick procedures with immediate comfort measures for infants, to brief concrete explanations for toddlers and preschoolers, to providing school-age children with appropriate control and therapeutic play, to supporting adolescents' autonomy and addressing their health misconceptions. This comprehensive framework ensures that pediatric medication administration balances therapeutic effectiveness with developmental sensitivity and safety.