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Aliment Pharmacol Ther. 2012 Mar;35(5):587-99. doi: 10.1111/j.1365-2036.2011.04983.x. Epub 2012 Jan 18.

Safety and patient outcomes with lubiprostone for up to 52 weeks in patients with irritable bowel syndrome with constipation.

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  • 1GI Physiology Laboratory, University of Michigan Health System, Ann Arbor, 48109-0362, USA. wchey@umich.edu



Irritable bowel syndrome with constipation (IBS-C) significantly decreases quality of life and the ability to perform daily living activities.


To demonstrate the long-term safety, tolerability and patient outcomes of lubiprostone in patients with IBS-C.


This extension study enrolled 522 IBS-C patients who had completed one of two randomised phase 3 studies. All enrolled patients received open-label lubiprostone orally for 36-weeks (8 mcg, twice daily). The primary objective was the assessment of long-term safety and tolerability, monitored via adverse events (AEs), laboratory parameters and vital signs. Additional outcome endpoints included monthly responder rates and patient evaluations of IBS-C symptom severity and impact on quality of life.


The evaluable safety population comprised of 520 patients; 476 of which had patient reported outcome data available. The overall safety profile of lubiprostone during this study was similar to that observed in the preceding phase 3 studies. The most common AEs were diarrhoea (11.0%), nausea (11.0%), urinary tract infection (9.0%), sinusitis (9.0%) and abdominal distention (5.8%). Diarrhoea and nausea were the most common treatment-related AEs. No serious AEs were considered treatment-related. Seventeen patients discontinued due to a treatment-related AE, of which diarrhoea and nausea accounted for six (1.2%) and three (0.6%) respectively. For responder rates and patient-evaluated parameters (n = 476), all groups experienced significant improvements from baseline, with initial improvements maintained throughout the study.


In patients with irritable bowel syndrome with constipation, lubiprostone 8 mcg twice daily was found to be safe and well tolerated over 9-13 months of treatment.

© 2012 Blackwell Publishing Ltd.

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