Address correspondence to: Susan Corey, PhD, Institute of Neurobiology 201 Blvd del Valle, San Juan, PR 00901. Tel: 787-721-4149, ext 222 • Fax: 787-721-4584 • E-mail: [email protected] Background: The CYP2D6 liver enzyme, which metabolizes 25-30% of common medications, is highly polymorphic. Existing studies of Hispanics have focused on Mexicans and Mexican-Americans. The goal of the study w...