Using peppermint oil to treat bladder pain syndrome

Efficacy of Peppermint Oil in a Randomized, Single-Blind, Placebo Controlled Trial in Women With Interstitial Cystitis/Bladder Pain Syndrome

Phase1; Phase2 Interventional University of Louisville · NCT04845217

This study is testing if peppermint oil can help people with bladder pain syndrome feel better over eight weeks compared to a placebo.

Quick facts

PhasePhase1; Phase2
Study typeInterventional
Enrollment100 (estimated)
Ages18 Years to 65 Years
SexFemale
SponsorUniversity of Louisville Academic / other
Locations1 site (Louisville, Kentucky)
Trial IDNCT04845217 on ClinicalTrials.gov

What this trial studies

This study evaluates the effectiveness of peppermint oil as a treatment for Interstitial Cystitis/Bladder Pain Syndrome (IC/BPS). Participants will complete symptom questionnaires to establish baseline data before being randomly assigned to receive either peppermint oil or a placebo for eight weeks. The study aims to determine if peppermint oil can alleviate symptoms associated with this chronic condition. Follow-up assessments will be conducted to monitor changes in symptoms over the treatment period.

Who should consider this trial

Good fit: Ideal candidates are women aged 18-65 who have been diagnosed with IC/BPS for at least one month.

Not a fit: Patients with recent urinary tract infections, certain gastrointestinal conditions, or those who are pregnant or breastfeeding may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could provide a new, non-invasive option for managing bladder pain and discomfort in patients with IC/BPS.

How similar studies have performed: While peppermint oil has been explored in other contexts, this specific application for IC/BPS is novel and has not been extensively tested in prior studies.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Women ages 18-65 years old
* Diagnosed with IC/BPS for at least one month prior to study enrollment

Exclusion Criteria:

* Culture proven urinary tract infection within 1 month of randomization
* Gross hematuria
* Currently pregnant or breastfeeding
* Unable to speak and read English
* History of allergic reaction to peppermint, coconut or enteric coating
* History of malabsorption syndrome
* History of gastroparesis
* History of gastric bypass surgery
* History of gastrointestinal, genitourinary or pelvic cancer in the last 5 years
* History of insulin dependent diabetes
* History of active urinary stone disease

Where this trial is running

Louisville, Kentucky

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Interstitial Cystitisinterstitial cystitisbladder pain syndromepeppermint
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.