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Peppermint power: could menthol ease colonoscopy cramps and spot more polyps?

NCT ID NCT07501962

Symptom relief Sponsor: The First Affiliated Hospital of Zhengzhou University Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests whether spraying a menthol solution into the colon during a colonoscopy can reduce painful muscle spasms and help doctors find more polyps. About 440 adults scheduled for a colonoscopy will take part. The goal is to see if this simple, natural compound can improve the procedure's comfort and accuracy.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 440 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Apr 2026

An estimate. Start dates often move.

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 75 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Age between 18 and 75 years, regardless of gender; 2. Scheduled to undergo colonoscopy (for screening, diagnostic, or follow-up purposes); 3. Adequate bowel preparation quality (Boston Bowel Preparation Scale score ≥ 6); 4. Voluntarily signed informed consent and able to cooperate with completing study-related assessments. Exclusion Criteria: 1. Allergy to menthol, cyclodextrin, or related substances; 2. History of severe intestinal diseases (such as ulcerative colitis, Crohn's disease, intestinal perforation, intestinal obstruction, intestinal tumors, etc.); 3. Presence of severe dysfunction of vital organs such as the heart, liver, kidneys, or lungs, or coagulation disorders; 4. Pregnant or lactating women; 5. Use of anticholinergic drugs, calcium channel blockers, or other spasmolytic agents within one week prior to the examination; 6. Psychiatric disorders or cognitive impairment that prevent cooperation with the study; 7. History of contraindications to colonoscopy or serious adverse reactions during previous procedures.

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Colonoscopy

How to take part

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  1. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  2. A doctor treating you

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