- Conditions
- Osteoarthritis, Chronic Pain
- Interventions
- ALO-01 (Morphine Sulfate Plus Naltrexone Hydrochloride Extended Release), Placebo
- Drug
- Lead sponsor
- Pfizer
- Industry
- Eligibility
- 21 Years and older
- Enrollment
- 547 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2006 – 2007
- U.S. locations
- 81
- States / cities
- Birmingham, Alabama • Mobile, Alabama • Peoria, Arizona + 69 more
Source: ClinicalTrials.gov public record
Updated Sep 19, 2013 · Synced May 22, 2026, 5:48 AM EDT