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Pfizer checks if new atirmociclib tablet matches the old one

NCT ID NCT07130097

Knowledge-focused Sponsor: Pfizer 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 completed Phase 1 study tested whether a new, higher-dose tablet of the cancer drug atirmociclib works the same in the body as the current tablet. Thirty-five healthy adults each received a single dose of both tablet forms after a meal, in random order. The goal was to see if the two formulations are bioequivalent, meaning they are absorbed and processed similarly.

What this could mean

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

Active substance
Atirmociclib (PF-07220060)
What this could lead to
If successful, this study could confirm that a higher-dose tablet works the same as the current one, potentially simplifying manufacturing or dosing.
What could go wrong
This is a small, early-phase study in healthy people, not patients. It only checks how the drug is absorbed, not whether it treats any disease.

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

35 people

The number who actually took part.

Started

Aug 2025

Finished

Nov 2025

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 65 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: * Participants who are overtly healthy as determined by medical evaluation including medical history, physical examination, and laboratory tests. * BMI of 17.5-30.5 kg/m2; and a total body weight \>50 kg (110 lb). * Evidence of a personally signed and dated ICD indicating that the participant has been informed of all pertinent aspects of the study. * Participants who are willing and able to comply with all scheduled visits, treatment plan, laboratory tests, lifestyle considerations, and other study procedures. Exclusion: * Evidence or history of clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular, hepatic, psychiatric, neurological, or allergic disease (including drug allergies, but excluding untreated, asymptomatic, seasonal allergies at the time of dosing). * A positive urine drug test * Unwilling or unable to comply with the Lifestyle Considerations criteria of this study * Use of prescription or nonprescription drugs and dietary and herbal supplements within 7 days or 5 half lives (whichever is longer) prior to the first dose of study intervention.

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As listed by the trial registrant

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

Healthy participant

Contacts and locations

Locations

  • Pfizer Clinical Research Unit - New Haven

    New Haven, Connecticut, 06511, United States

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