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Ear zaps may change how you feel pain

NCT ID NCT07325058

Knowledge-focused Sponsor: Aalborg University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 explores how stimulating a nerve in the ear with different frequencies can change how healthy people feel pain. Researchers will apply a mild electric current to the ear and measure pain from capsaicin (the spicy part of chili peppers) and pressure. The goal is to understand the effects and how long they last, which could help develop new pain treatments.

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 36 people

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

Started

Dec 2025

Expected to finish

Apr 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

16 to 60 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: * Healthy * Speak and understand English * 18-60 years old. Exclusion Criteria: * Pregnant and/or breastfeeding * Regular use of cannabis, opioids or other drugs * Current or previous neurologic, musculoskeletal, mental, or other illnesses (e.g., brain or spinal cord injuries, degenerative neurological disorders, major depression, cardiovascular disease, chronic lung disease, etc.) * Current regular (once or more a week) use of analgesic medication or other medication which may affect the trial (including paracetamol and NSAIDs) * Recent history of acute pain particularly in the lower limbs * Abnormally disrupted sleep in 24 hours preceding experiment * Contraindications to electric stimulation application (history of epilepsy, metal implants in head or jaw, etc.) * Lack of ability to cooperate * Contraindications for capsaicin including an intolerance chili consumption and burns or wounds to the application site.

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As listed by the trial registrant

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

Experimental pain in healthy human subjects

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. 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 ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Center For Neuroplasticity and Pain

    RECRUITING

    Aalborg, 9000, Denmark