"Results

It appears that peppermint oil may have several mechanisms of action [including smooth muscle relaxation, visceral sensitivity modulation, anti-microbial effects, anti-inflammatory activity and modulation of psychosocial distress]. Peppermint oil has been found to affect oesophageal, gastric, small bowel, gall-bladder, and colonic physiology. It has been used to facilitate completion of colonoscopy and endoscopic retrograde cholangiopancreatography. Placebo controlled studies support its use in irritable bowel syndrome, functional dyspepsia, childhood functional abdominal pain, and post-operative nausea. Few adverse effects have been reported in peppermint oil trials."