- Is opioid naïve (ie, taking <20 mg oxycodone/day or opioid equivalent) or is opioid experienced (ie, taking a dose between 20 and 240 mg [inclusive] oxycodone/day or opioid equivalent) for management of moderate-to-severe CLBP at least 14 days prior to screening and will, in the opinion of the investigator, continue to require opioid therapy (between 20 and 240 mg oxycodone/day, inclusive) for management of moderate-to-severe CLBP for the duration of the study.