Study to Evaluate the Long-Term Safety of Hydrocodone Bitartrate Extended-Release Tablets (CEP-33237) in Patients Who Require Opioid Treatment for an Extended Period of Time

The primary objective of this study is to evaluate the safety of hydrocodone extended-release tablets when used over a 12-month period in patients with chronic pain, as assessed by adverse events, clinical laboratory results, vital signs measurements, electrocardiogram results, physical examination findings, pure tone audiometry, and concomitant medication usage.

This was a Phase 3, open-label, nonrandomized study that consisted of a screening period, an open label titration period, and a 52 week, long term, open-label treatment period in patients with chronic pain. Patients were eligible to participate in this study if they had completed study C33237/3079 (NCT01240863) (these patients are hereafter referred to as rollover patients) or if they had not participated in study 3079 (these patients are hereafter referred to as either new opioid naïve or new opioid experienced patients).