Children are particularly vulnerable in radiological and nuclear incidents and may need pharmaceutical countermeasures, including antidotes and cytokines. This study addresses the gap of pediatric countermeasures in research. It outlines pediatric indications and dosing of medical countermeasures for radiation exposure and internal contamination with radioactive materials: Advanced Hazmat Life Support (AHLS) for Radiological Incidents and Terrorism, DailyMed, Internal Contamination Clinical Reference, Medical Aspects of Radiation Incidents, and Medical Management of Radiological Casualties, as well as Micromedex, POISINDEX, and Radiation Emergency Medical Management (REMM).