~24 spots leftby Apr 2026

Opioid-induced Bowel Dysfunction: Pivotal Assessment of Lubiprostone

(OPAL Trial)

Recruiting in Palo Alto (17 mi)
+94 other locations
Age: 18+
Sex: Any
Travel: May Be Covered
Time Reimbursement: Varies
Trial Phase: Phase 3
Waitlist Available
Sponsor: Sucampo Pharma Americas, LLC
Pivotal Trial (Near Approval)
Prior Safety Data

Trial Summary

What is the purpose of this trial?

The primary purpose of this study is to evaluate the efficacy and safety of lubiprostone administration in patients with Opioid-induced Bowel Dysfunction.

Research Team

CT

Clinical Team Leader

Principal Investigator

Mallinckrodt

Eligibility Criteria

Inclusion Criteria

Consistent treatment for chronic, non-cancer-related pain with any full agonist opioid for at least 30 days prior to screening.
Diagnosis of opioid-induced bowel dysfunction (OBD) as confirmed during the screening period.
If patient has a history of chronic constipation, condition must have been exacerbated by initiation of opioid treatment.
See 3 more

Treatment Details

Interventions

  • Lubiprostone (Chloride Channel Activator)
  • Placebo (Other)
Participant Groups
2Treatment groups
Experimental Treatment
Placebo Group
Group I: LubiprostoneExperimental Treatment1 Intervention
24 mcg capsules twice daily (BID)
Group II: PlaceboPlacebo Group1 Intervention
0 mcg capsules twice daily (BID)

Find a Clinic Near You

Who Is Running the Clinical Trial?

Sucampo Pharma Americas, LLC

Lead Sponsor

Trials
18
Recruited
5,200+

Sucampo Pharmaceuticals, Inc.

Industry Sponsor

Trials
11
Recruited
2,700+