Overview Phase 2 Chronic Low Back Pain Study Status: Completed Trial end date: 2011-10-01 Target enrollment: Participant gender: Summary The primary purpose of this study was to evaluate the analgesic effect and safety of hydrocodone/acetaminophen extended release compared to placebo. Phase: Phase 2 Details Lead Sponsor: AbbVie (prior sponsor, Abbott)Treatments: AcetaminophenAcetaminophen, hydrocodone drug combinationHydrocodoneOxycodone