A randomised, crossover study of study drug 038 and controlled-release oxycodone HCl tablets in patients with chronic non-cancer pain

Study hypothesis: Study drug 038 will be superior to controlled-release (CR) oxycodone on bowel function and not inferior to CR oxycodone in pain control in patients with chronic non-cancer pain.
As of 13/08/2010 this record was updated to include an extended end date; the initial anticipated end date at the time of registration was 15/09/2009.
As of 10/01/2011 this record was again updated to include an extended end date; the previous anticipated end date at the time of registration was 31/03/2011.
Primary outcome(s): Pain intensity and bowel function measured during the last week of treatment in each phase.