RecruitingPhase 4Drug trialPharmacogenetically-guided Escitalopram Treatment for Pediatric Anxiety: Aiming to Improve Safety and Efficacy (PrEcISE)This double-blind, 12-week study will consist include132 anxious youth who are randomized (1:1) to standard or pharmacogenetically-guided escitalopram dosing. Block randomization (1:1) will be stratified by sex and metabolizer status.