Overview Effects of Open-label vs Double-blind Treatment in IBS Status: Completed Trial end date: 2019-01-01 Target enrollment: Participant gender: Summary The purpose of this study is to investigate placebo effects and peppermint oil in Irritable Bowel Syndrome. Phase: N/A Details Lead Sponsor: Anthony LemboBeth Israel Deaconess Medical CenterCollaborator: National Center for Complementary and Integrative Health (NCCIH)Treatments: Peppermint oil