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About
Peppermint oil has shown to be effective in the treatment of Irritable Bowel Syndrome (IBS) symptoms in several meta-analyses. However, the level of evidence is moderate and peppermint oil remains relatively under-used in IBS. Therefore, the investigators will conduct a multicenter randomized, placebo controlled trial to investigate the effects of an eight-week peppermint oil treatment in IBS patients according to current European Medicines Agency (EMA) / US Food and Drug Administration (FDA) guidelines. To improve efficacy and to reduce side effects, the investigators aim to study the use of a new peppermint oil formulation, a colon-targeted-delivery capsule that will release the oil in the (ileo-) colonic region specifically.
Enrollment
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Volunteers
Inclusion criteria
Age between 18 and 75 years;
Diagnosed with Irritable Bowel Syndrome according to the Rome IV criteria:
(Recurrent abdominal pain, at least 1 day/week for the last 3 months; Symptom onset at least 6 months prior to diagnosis; Associated with two or more of the following:
Based on the medical history and previous examination, no other causes for the abdominal complaints can be defined. Especially no history of:
Women in fertile age (<55 years old) must use contraception or be postmenopausal for at least two years.
Average worst abdominal pain score (on 11-point NRS) of > 3, during the two-week run-in period.
Exclusion criteria
Insufficient fluency of the Dutch language;
Any previous use (also incidental use) of peppermint oil capsules in the last 3 months prior to inclusion (the use of peppermint tea, menthol candy etc. is allowed);
The inability to stop regular use of medication affecting the gastro-intestinal system (such as Non Steroidal Anti Inflammatory Drugs (NSAID), laxatives, prokinetics, opioids, smasmolytics and anti-diarrhoeal drugs). This use should be halted at least 1 week before enrollment into the run-in period;
Previous major abdominal surgery or radiotherapy interfering with gastrointestinal function:
History of liver disease, cholangitis, achlorhydria, gallstones or other diseases of the gallbladder/biliary system;
Pregnancy, lactation;
Using drugs of abuse;
Known allergic reaction to peppermint.
Primary purpose
Allocation
Interventional model
Masking
190 participants in 3 patient groups, including a placebo group
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Data sourced from clinicaltrials.gov
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