Evaluation of the Efficacy and Safety of ADL5945 Once Daily for the Treatment of Opioid-induced Constipation in Adults Taking Opioid Therapy for Chronic Noncancer Pain
Morphine and related opioid analgesics are known to slow gastrointestinal (GI) motility and reduce intestinal secretion through their binding to μ opioid receptors (MORs) within the GI tract. The most common symptoms associated with the effects of opioids are constipation and nausea and/or vomiting. Moreover, constipation is a common and distressing side effect of long-term opioid therapy.
The primary objective of this study was to compare ADL5945 once daily, a MOR antagonist, with placebo in the treatment of opioid-induced constipation (OIC) in adults taking long-term opioid therapy for chronic noncancer pain.
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
|Official Title:||A Randomized, Double-blind, Placebo-controlled, Phase 2 Study to Evaluate the Efficacy and Safety of ADL5945 Once Daily for the Treatment of Opioid-induced Constipation in Adults Taking Opioid Therapy for Chronic Noncancer Pain|
- Change From Baseline in the Weekly Average of Spontaneous Bowel Movements (SBMs) During Treatment [ Time Frame: Baseline, Weeks 1 through 4 of treatment ]An SBM was defined as a bowel movement (BM) with no laxative use in the previous 24 hours. Each weekly SBM average was calculated as follows: (7 × number of SBMs) / (number of days with nonmissing data). The overall SBM rate for the 4-week double-blind treatment period was calculated as follows: (the average of the first week + the average of the second week + the average of the third week + the average of the fourth week) / 4.
|Study Start Date:||January 2011|
|Study Completion Date:||August 2011|
|Primary Completion Date:||August 2011 (Final data collection date for primary outcome measure)|
Placebo Comparator: Placebo
Each participant received 1 placebo capsule orally every day (QD) during the Run-in Placebo Period (1 week), the Double-blind Treatment Period (4 weeks), and the Run-out Placebo Period (1 week).
Experimental: ADL5945 0.25 mg
During the Run-in Placebo Period, each participant received 1 placebo capsule orally QD for 1 week. Then during the Double-blind Treatment Period, each participant received one 0.25-milligrams (mg) ADL5945 capsule orally QD for 4 weeks. Then during the Run-out Placebo Period, each participant received 1 placebo capsule orally QD for 1 week.
|Drug: Placebo Drug: ADL5945 0.25 mg|
Please refer to this study by its ClinicalTrials.gov identifier: NCT01275755
|United States, Florida|
|Compass Research, LLC|
|Orlando, Florida, United States, 32806|
|United States, Louisiana|
|Louisiana Research Associates Inc|
|New Orleans, Louisiana, United States, 70114|