Opioid-induced constipation: advances and clinical guidance

Area of Science:

• Gastroenterology
• Pain Management
• Pharmacology

Background:

• Opioids are primary analgesics for chronic noncancer pain.
• Opioid-induced constipation (OIC) is a prevalent adverse effect impacting patient quality of life.
• Effective management strategies for OIC are increasingly necessary.

Purpose of the Study:

• To review the clinical presentation and diagnosis of OIC.
• To explore barriers in diagnosing OIC.
• To discuss current and emerging pharmacologic treatments and propose a management algorithm for OIC in noncancer pain patients.

Main Methods:

• Literature review of clinical presentations, diagnostic challenges, and therapeutic approaches for OIC.
• Analysis of opioid effects on the gastrointestinal tract and differential tolerance.
• Evaluation of approved and investigational medications for OIC treatment.

Main Results:

• OIC presents diagnostic challenges due to varying patient-reported symptoms and clinician awareness.
• Opioids differentially affect gastrointestinal motility and sensation, leading to constipation.
• Several therapeutic options, including peripherally acting mu-opioid receptor antagonists and other agents, are available and in development.

Conclusions:

• A systematic approach is needed for the diagnosis and management of OIC.
• Understanding the pathophysiology of OIC is crucial for effective treatment.
• A proposed clinical management algorithm can guide OIC treatment in noncancer pain patients.