AstraZeneca Announces Positive Phase III Results from Naloxegol Pivotal Trials In Patients With Opioid-Induced Constipation

AstraZeneca

today announced positive top-line results from two Phase III trials and one safety extension trial in patients with non-cancer related pain and opioid-induced constipation (OIC). These Phase III KODIAC trials evaluated the safety and efficacy of naloxegol, an oral peripherally-acting, mu-opioid receptor antagonist for the treatment of OIC, a common side effect of prescription opioids. KODIAC-04 and -05 are both multicenter, randomized, double-blind, placebo-controlled pivotal trials of 12 weeks duration evaluating 12.5 mg and 25 mg naloxegol administered once-daily. The primary endpoint in both trials was percentage of OIC responders versus placebo over 12 weeks of treatment where a responder was defined as having at least three Spontaneous Bowel Movements (SBM) per week, with at least one SBM per week increase over baseline, for at least nine out of 12 weeks, and at least three out of the last four weeks. Under the design of both trials, statistical significance for the primary endpoint would be achieved if at least one of the two naloxegol doses had a p-value <0.025 compared with placebo. Analysis of the data indicates that in KODIAC-04 both naloxegol doses (12.5 mg and 25 mg) demonstrated statistically significant results for