A Study to Demonstrate the Analgesic Efficacy of Oxycodone/Naloxone Prolonged Release Tablets in Addition to Pregabalin Compared to Pregabalin Alone in Opioid-naïve Subjects Treated With Pregabalin Suffering From Moderate to Severe Pain Due to Diabetic Polyneuropathy

An Exploratory, Randomised, Double-blind, Single-dummy, Placebo Controlled, Parallel Group Study to Demonstrate the Analgesic Efficacy of Oxycodone/Naloxone Prolonged Release Tablets in Addition to Pregabalin Compared to Pregabalin Alone in Opioid-naïve Subjects Treated With Pregabalin Suffering From Moderate to Severe Pain Due to Diabetic Polyneuropathy

To show superior analgesic efficacy of OXN PR in addition to a patient's current dose of pregabalin compared to pregabalin alone.

Study OXN2502 is a pilot, exploratory, randomised, placebo-controlled, double-blind, single-dummy, parallel group study to assess efficacy and safety of OXN PR in addition to a patient's current dose of pregabalin compared to pregabalin alone in opioid-naïve subjects treated with pregabalin suffering from moderate to severe pain due to diabetic polyneuropathy.

Inclusion criteria:

• Moderate to severe pain due diabetic polyneuropathy
• Opioid-naive subjects

Exclusion criteria:

• Females who are pregnant or lactating
• Subjects with evidence of significant structural abnormalities of the gastrointestinal tract
• Subjects with evidence of impaired liver/kidney function upon entry into the study