For patients who fail conventional therapies, ability to access medical Cannabis may offer a therapeutic alternative that addresses their unmet clinical need. However, a paucity of clinical trial evidence has led to ambiguous pediatric dosing guidelines for medical Cannabis, a situation further complicated by the impact of developmental maturation of the pharmacokinetic (PK) and pharmacodynamic (PD) processes governing drug effect and dosing requirements. The pediatric population is very heterogeneous, and dissimilar developmental trajectories result in important differences in the rate and extent of cannabinoid absorption, distribution, elimination, and response both between and within pediatric age group classifications. These developmental changes will require the prescribing caregiver to consider age-specific dosage regimens that may demand continual modification as the child ages. The chapter that follows emphasizes the impact of agerelated changes in PK and PD processes as important considerations in pediatric dosing recommendations for medical Cannabis.