Four studies evaluated the association of stimulant medication and a lifetime history of ever using marijuana, with ORs ranging from 0.73 to 1.37, and all 95% CIs included 1. The random-effects model estimated that children with a history of stimulant medication treatment were comparable to those without (OR, 1.01; 95% CI, 0.68−1.50; P =.95). No significant heterogeneity was observed (Q = 1.85, P =.60).
