Volume 34, Issue 5 pp. 818-829
Meta Analysis and Systematic Review

Peripherally acting μ-opioid antagonist for the treatment of opioid-induced constipation: Systematic review and meta-analysis

Kenichi Nishie

Corresponding Author

Kenichi Nishie

Department of Respiratory Medicine, Iida Municipal Hospital, Iida, Nagano, Japan

The First Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan

Correspondence

Kenichi Nishie, Department of Respiratory Medicine, Iida Municipal Hospital, 438 Yawatamachi, Iida, Nagano 395-0814, Japan.

Email: [email protected]

Search for more papers by this author
Shuhei Yamamoto

Shuhei Yamamoto

Department of Rehabilitation, Shinshu University Hospital, Matsumoto, Japan

Search for more papers by this author
Takayoshi Yamaga

Takayoshi Yamaga

Department of Occupational Therapy, Health Science University, Fujikawaguchikomachi, Yamanashi, Japan

Search for more papers by this author
Naoto Horigome

Naoto Horigome

Department of Digestive Surgery, Iida Municipal Hospital, Iida, Nagano, Japan

Search for more papers by this author
Masayuki Hanaoka

Masayuki Hanaoka

The First Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan

Search for more papers by this author
First published: 29 December 2018
Citations: 17
Financial support: No funding.

Abstract

Background and Aim

Opioid-induced constipation (OIC) is a frequent adverse event (AE) that impairs patients' quality of life (QOL). Peripherally acting μ-opioid receptor antagonists (PAMORAs) have been recognized as a treatment option for OIC, but the effect consistent across the studies has not been evaluated.

Methods

We conducted a quantitative meta-analysis to explore the efficacy of PAMORA for OIC (registered with PROSPERO: CRD42018085298). We systematically searched randomized controlled trials (RCTs) in Medline, Embase, and Central databases. Change from baseline in spontaneous bowel movements, pooled proportion of responders, QOL, and AEs were calculated and compared with results in placebo cases.

Results

We included 31 RCTs with 7849 patients. A meta-analysis revealed that patients under PAMORA therapy had considerably improved spontaneous bowel movement from baseline compared with those given placebo (20 RCTs; mean difference, 1.43; 95% confidence interval [CI], 1.18–1.68; n = 5622) and more responded (21 RCTs; risk ratio [RR], 1.81; 95% CI, 1.55–2.12; n = 4821). Moreover, QOL of patients receiving PAMORA was significantly better (8 RCTs; mean difference, −0.22; 95% CI, −0.28 to −0.17; n = 2884). AEs were increased significantly in the PAMORA group (26 RCTs; RR, 1.10; 95% CI, 1.06–1.15; n = 7715), especially in gastrointestinal disorders, whereas serious AEs were not significant (17 RCTs; RR, 1.04; 95% CI, 0.85–1.28; n = 5890).

Conclusion

Peripherally acting μ-opioid receptor antagonist has been shown to be effective and durable for patients with OIC and is the only drug with confirmed evidence in meta-analysis. The possibility of publication bias was the limitation of this study.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.