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New painkiller candidate MT-8554 tested in healthy men

NCT ID NCT02536209

Knowledge-focused Sponsor: Tanabe Pharma Corporation Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 early-stage study tested a single dose of MT-8554, a new drug being developed for pain, in 20 healthy men. Researchers measured how the drug affects the body's response to a cold-induced pain test and checked for safety. The goal was to gather initial data, not to treat any condition.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
MT-8554
What this could lead to
If successful, this could point toward a new painkiller that works differently from existing options.
What could go wrong
This is a very early Phase 1 trial in just 20 healthy people, so it cannot predict real-world pain relief or safety in patients. The drug may not work or could have side effects.

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

Phase 1

The first testing in people. Mainly checks safety and dose, usually in a small group.

Participants

20 people

The number who actually took part.

Start date

Aug 2015

Finished

Nov 2015

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

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

Ages

18 to 55 years

Sex

Male participants only

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 and free from clinically significant illness or disease * Male Caucasian subjects aged 18 to 55 * A body weight of ≥60 kg Exclusion Criteria: * Participation in more than three clinical studies involving administration of an Investigational Medicinal Product (IMP) in the previous year, or any study within 12 weeks. * Clinically significant endocrine, thyroid, hepatic, respiratory, gastro-intestinal, renal, cardiovascular disease, or history of any significant psychiatric/psychotic illness disorder. * Clinically relevant abnormal medical history, physical findings or laboratory values

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As listed by the trial registrant

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

Healthy

Contacts and locations

Locations

  • Investigational center

    City Name, United Kingdom

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