Overview A Study to Explore Plasma Levels of CONCERTA, Ritalin-SR and Novo-Methylphenidate ER-C in Healthy Volunteers Status: Completed Trial end date: 2010-06-01 Target enrollment: Participant gender: Summary This is a study of blood plasma levels of methylphenidate in healthy volunteers over a 24 hour period after they take this medication. Phase: Phase 1 Details Lead Sponsor: Janssen-Ortho Inc., CanadaTreatments: Methylphenidate