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CompletedNCT06340347Updated Jan 10, 2025

A Study to Learn How the Body Processes the Study Medicine Called Osivelotor (PF-07940367) in People With Loss of Liver Function

A Phase 1 interventional study of Osivelotor in Liver Diseases, sponsored by Pfizer. Completed at 3 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-01-10.

Sponsored by Pfizer · Phase 1, Interventional, and Basic science

From the registry’s dates

  • Primary completion was Sep 2024, 2 years ago, and no results have been posted to the registry.
Phase
Phase 1
Study type
Interventional
Enrollment
8
Allocation
Non-randomized
Ages
18 Years and older
Sex
All
01

Study summary

The purpose of this study is to understand how Osivelotor is processed in people with loss of liver function.

This study is seeking participants that are:

  • stable loss of liver function with mild or moderate severity
  • none of underlying conditions possibly affecting the study medicine being absorbed by the body

All participants will receive one amount of Osivelotor by mouth before breakfast on the first day at the study clinic. A number of blood samples will be collected to understand how Osivelotor is changed and removed from the body. Participants will also have to undergo physical examination and other tests. This will help to understand if Osivelotor is safe.

Participants will take part in the study for a maximum of 112 days. During this time, participants will have to stay onsite for 5 days. There will be 5 study visits at the study clinic.

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Conditions studied

  • Liver Diseases

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03

In context

Liver Diseases

2,081 studies on the registry are indexed under Liver Diseases; 390 are open to participants now.

This study's enrollment of 8 is below the median of 50 across 1,323 interventional studies indexed under Liver Diseases.

Browse Liver Diseases studies →

Lead sponsor

Pfizer is the lead sponsor of 3,244 studies on the registry; 139 are open to participants now.

Of its 582 completed or terminated interventional studies of FDA-regulated products, 381 (65%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Body mass index (BMI) of 16 to 40 kg/m2, inclusive; and a total body weight greater than 50 kg (greater than 110 lb)
  • Stable hepatic impairment that meets the criteria for Class A or B of the Child Pugh classification with no clinically significant change in disease status within the 28 days prior to the screening visit
  • Stable concomitant medications for the management of individual participants' medical history

Exclusion criteria

Exclusion Criteria:

  • Any condition possibly affecting drug absorption (eg, prior bariatric surgery, gastrectomy, ileal resection, prior status portacaval shunt surgery);
  • Hepatic carcinoma or hepatorenal syndrome or limited predicted life expectancy;
  • A diagnosis of hepatic dysfunction secondary to any acute ongoing hepatocellular process that is documented by medical history, physical examination, liver biopsy, hepatic ultrasound, computerized tomography scan, or MRI;
  • Presence of clinically active Stage 3 or 4 hepatic encephalopathy. Clinically active Stage 2 encephalopathy is allowed if, in the opinion of the investigator, the participant is able to provide informed consent.
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Study design

Phase
Phase 1
Primary purpose
Basic science
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
8 participants (actual)

Study arms

  • Experimental
    Group 1

    Participants with moderate hepatic impairment will receive a single dose of osivelotor, administered orally under fasted conditions.

    Drug: Osivelotor

  • Experimental
    Group 2

    Participants with mild hepatic impairment will receive a single dose of osivelotor, administered orally under fasted conditions.

    Drug: Osivelotor

Interventions

  • DrugOsivelotor

    a single dose of osivelotor administered by mouth under fasted conditions Other Names: PF-07940367

06

What researchers measure

Primary outcomes

  1. Area under the whole blood and plasma concentration versus time curve (AUC) from time zero (pre-dose) to the last quantifiable concentration (AUClast) of osivelotor

    Time frame: 0 hours (pre-dose) to 84 days post-osivelotor dose

  2. Area under the whole blood and plasma concentration versus time curve (AUC) from time zero (pre-dose) to extrapolated infinite time (AUCinf) of osivelotor

    Time frame: 0 hours (pre-dose) to 84 days post-osivelotor dose

  3. Maximum observed whole blood and plasma concentration (Cmax) of osivelotor

    Time frame: 0 hours (pre-dose) to 84 days post-osivelotor dose

Secondary outcomes

  1. Number of Participants With Treatment-Emergent Adverse Events (AEs)

    Time frame: From baseline up to 56 days after osivelotor dose

  2. Number of Participants With Clinically Significant Laboratory Abnormalities

    Time frame: From baseline up to 84 days after osivelotor dose

  3. Number of Participants With Clinically Significant Electrocardiogram (ECG) Findings

    Time frame: From baseline up to 84 days after osivelotor dose

  4. Number of Participants With Clinically Significant With Clinically Significant Vital Signs

    Time frame: From baseline up to 84 days after osivelotor dose

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Study locations

3 sites
  • Orange County Research Center
    Lake Forest, California 92630, United States
  • Genesis Clinical Research, LLC
    Tampa, Florida 33603, United States
  • Thomas Jefferson University-Pharmacology, Physiology and Cancer Biology
    Philadelphia, Pennsylvania 19107, United States
08

References and documents

Individual participant data

Plan to share: No — Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jan 10, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT06340347
Lead sponsor
Pfizer
Responsible party
Sponsor
First posted
Apr 1, 2024
Start date
Apr 30, 2024
Primary completion
Sep 18, 2024
Completion
Sep 18, 2024
Last update
Jan 10, 2025

Study contacts

Pfizer CT.gov Call Center
study director · Pfizer

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jan 2025. You cannot join it, but the record below documents what was studied.

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