Overview Effects of Isotretinoin on CYP2D6 Activity Status: Active, not recruiting Trial end date: 2026-07-26 Target enrollment: Participant gender: Summary Specific Aim: To investigate if isotretinoin (13-cis-retinoic acid) administration decreases CYP2D6 activity in adolescent patients. Phase: Phase 4 Details Lead Sponsor: University of WashingtonCollaborator: National Institute of General Medical Sciences (NIGMS)Treatments: DextromethorphanIsotretinoin