Clinical trial Recruiting at 1 site Phase1; Phase2 Interventional Ages 18 to 65 Women only

Using peppermint oil to treat bladder pain syndrome

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

Run by University of Louisville · NCT04845217 · Data updated 2026-11-12

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
Ages18 Years to 65 Years
SexWomen only
Enrollment100 (estimated)
SponsorUniversity of Louisville
Academic / other
Locations1 site (Louisville, Kentucky)
StatusRecruiting
StartedSeptember 15, 2021
Main results expectedJune 2023
Study endsDecember 2023
Registry record updatedAugust 22, 2022
Trial IDNCT04845217 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

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

Probably 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.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

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.

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 gone: 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.

Who can join: the full rules

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 it's running

  • Springs Medical Center
    Louisville, Kentucky, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

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  • Treatment of bladder pain using VNX001

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  • Acupuncture for treating bladder pain syndrome in women

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  • Assessing pain types in treating bladder pain syndrome

    This study is trying to see how different types of bladder pain affect how well people with bladder pain syndrome respond to pelvic floor physical therapy and cognitive-behavioral therapy.

    Recruiting Vanderbilt University Medical Center · Franklin, Tennessee · NCT06299683

  • Using amniotic membrane therapy to treat interstitial cystitis and painful bladder syndrome

    This study is testing whether injections of amniotic membrane therapy can help people with interstitial cystitis and painful bladder syndrome feel less pain and improve their urinary symptoms.

    Recruiting Phase 2/3 University Hospitals Cleveland Medical Center · Clevleand, Ohio · NCT06096597

  • Evaluating VNX001 for bladder pain relief in patients with interstitial cystitis

    This study is testing if a new treatment called VNX001 can help relieve bladder pain in people with interstitial cystitis better than its individual ingredients or a placebo.

    Recruiting at 11 sites Phase 2 Vaneltix Pharma, Inc. · Escondido, California and 13 other locations · NCT05737121

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.