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PF-07799544

Phase 1

Healthy Male Volunteers | Small molecule | Other |Pfizer, Inc.|Last Updated: Sep 1, 2026

Target and mechanism

Molecular targetBRAF
Target classGene
ModalitySmall molecule

Also known as Oral [14C] PF-07799544

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment9

FDA Designations

No designations recorded

Clinical trial landscape

PF-07799544 · 2 trials · 14 indications

Phase 1 2
NCT07578636A Study to Understand What the Body Does to the Study Medicine Called PF-07799544 When Taken by Healthy AdultsHealthy Male Volunteers
ACTIVE NOT_RECRUITING9 Analytics
NCT05538130A Study to Learn About the Study Medicine Called PF-07799544 as Monotherapy or in Combination in People With Advanced Solid TumorsMelanoma
ACTIVE NOT_RECRUITING148 Analytics
PHASE1ACTIVE NOT_RECRUITING
A Study to Understand What the Body Does to the Study Medicine Called PF-07799544 When Taken by Healthy Adults
Healthy Male VolunteersUnlock trial analytics
PHASE1ACTIVE NOT_RECRUITING
A Study to Learn About the Study Medicine Called PF-07799544 as Monotherapy or in Combination in People With Advanced Solid Tumors
MelanomaUnlock trial analytics

Study Endpoints

Primary Endpoints

Total recovery (%) of radioactivity in urine, feces and vomitus (if any), expressed as a percent of total oral radioactive dose administered.
Period 1 pre-dose to maximum days 15

To characterize the extent of excretion of total radioactivity in urine, feces and vomitus (if any) following administration of a single oral dose of \[14C\]PF-07799544.

Metabolic profiling/identification and determination of relative abundance of [14C]PF-07799544 and the metabolites of PF-07799544 in plasma, urine and feces, if possible.
Period 1 pre-dose to maximum days 15

To characterize the metabolic profile and identify the circulating and excreted metabolites of PF- 07799544 following administration of a single oral dose of \[14C\]PF-07799544.

Phase 1a monotherapy and Phase 1b combination dose escalation: Number of participants with dose limiting toxicities (DLTs)
Cycle 1 (21 days)

DLTs will be evaluated during the first cycle (21 days) as a single agent (phase 1a monotherapy) or in combination with other agents (phase 1b dose escalation)

Phase 1a monotherapy and Phase 1b combination dose escalation: Number of participants with treatment-emergent adverse events (AEs)
Baseline to 28 days after last dose of study medication

AEs as characterized by type, frequency, severity, timing, seriousness, and relationship to study therapy

Phase 1a monotherapy and Phase 1b combination dose escalation: Number of participants with clinically significant change from baseline in laboratory abnormalities
Baseline to 28 days after last dose of study treatment

Laboratory abnormalities as characterized by type, frequency, severity, and timing.

Phase 1a monotherapy and Phase 1b combination dose escalation: Number of participants with clinically significant change from baseline in vital sign abnormalities
Baseline to 28 days after last dose of study treatment

Vital sign abnormalities as characterized by type, frequency, severity, and timing.

Phase 1a monotherapy and Phase 1b combination dose escalation: Number of participants with clinically significant change from baseline in physical exam abnormalities
Baseline to 28 days after last dose of study treatment

Physical exam abnormalities as as graded by National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version 5.0.

Phase 1b Dose Expansion: Overall response rate (ORR)
Baseline to 2 years

Response will be evaluated via radiographical tumor assessments by RECIST v1.1 for solid tumors or RANO for primary brain tumors

Secondary Endpoints

The ratio of dose-normalized AUCinf (if data permit, otherwise AUClast) of oral PF-07799544 to IV [14C]PF-07799544.
Period 2 pre-dose to maximum days 6.
The ratio of total recovered radioactivity 14C in urine following single dose administration of [14C]PF-07799544 orally in Period 1 and IV microtracer, microdose administration of [14C]PF-07799544 in Period 2.
Period 1 pre-dose to maximum days 15; Period 2 pre-dose to maximum days 6.
Number of Participants With Treatment Emergent Adverse Events.
Baseline up to 28 to 35 days post last study intervention dose.
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelCROSSOVER
PurposeBASIC_SCIENCE

Treatment Arms

ArmTypeDescription
Cohort 1EXPERIMENTALParticipants will receive one dose of \[14C\] PF-07799544 by mouth in Period 1. After a washout, participants will receive one dose of PF-07799544 by mouth and one intravenous (IV) infusion of \[14C\] PF-07799544 in Period 2
Phase 1a Monotherapy Dose EscalationEXPERIMENTALParticipants will receive PF-07799544
Phase 1b Combination Dose EscalationEXPERIMENTALParticipants will receive PF-07799544 and PF-07799933
Phase 1b Combination Dose ExpansionEXPERIMENTALParticipants will receive PF-07799544 and PF-07799933

Interventions

NameTypeDescription
Oral [14C] PF-07799544DRUGA single oral dose of \[14C\] PF-07799544 will be administered as an extemporaneous suspension in Period 1.
Oral Unlabeled PF-07799544DRUGA single oral dose of unlabeled PF-07799544 will be administered as extemporaneous solution in Period 2.
IV [14C] PF-07799544DRUGA single IV infusion of \[14C\] PF-07799544 will be administered at the approximate Tmax after administration of the unlabeled oral dose of PF-07248144 in Period 2.
PF-07799544DRUGTablet
PF-07799933DRUGTablet
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Eligibility Criteria

Age Range18 Years to 55 Years
SexMALE
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: Males 18 to 55years of age, inclusive, at screening who are overtly healthy as determined by medical evaluation including medical history, physical examination, laboratory tests, vital signs, and 12-lead ECGs. BMI of 17.5-32 kg/m2; and a total body weight \>50 kg (110 lb). Exc...

Countries:United StatesAustraliaBrazilCanadaChinaIsraelJapan
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Recent Changes (Last 90 Days)

MEDIUMSep 1, 2026NCT05538130Status: RECRUITING → ACTIVE_NOT_RECRUITING
MEDIUMSep 1, 2026NCT05538130Status: RECRUITING → ACTIVE_NOT_RECRUITING
LOWAug 14, 2026NCT05538130lastUpdatePostDate: changed
LOWAug 14, 2026NCT05538130lastUpdatePostDate: changed
LOWJul 29, 2026NCT05538130lastUpdatePostDate: changed
LOWJul 29, 2026NCT05538130lastUpdatePostDate: changed
MEDIUMJul 28, 2026NCT07578636Status: RECRUITING → ACTIVE_NOT_RECRUITING
MEDIUMJul 28, 2026NCT07578636Status: RECRUITING → ACTIVE_NOT_RECRUITING
LOWJul 9, 2026NCT07578636startDate: changed
LOWJul 9, 2026NCT05538130lastUpdatePostDate: changed
LOWJul 9, 2026NCT07578636startDate: changed
LOWJul 9, 2026NCT05538130lastUpdatePostDate: changed
LOWJul 2, 2026NCT05538130lastUpdatePostDate: changed
LOWJul 2, 2026NCT05538130lastUpdatePostDate: changed
LOWJul 2, 2026NCT05538130lastUpdatePostDate: changed
LOWJul 2, 2026NCT05538130lastUpdatePostDate: changed
LOWJun 18, 2026NCT07578636startDate: changed
LOWJun 18, 2026NCT07578636startDate: changed
LOWJun 18, 2026NCT07578636startDate: changed
LOWJun 11, 2026NCT07578636primaryCompletionDate: changed

Frequently asked questions about PF-07799544

What is PF-07799544 used for?

PF-07799544 is an investigational small molecule being studied for use in advanced solid tumors, including melanoma, glioma, thyroid cancer, and non-small cell lung cancer. It is also being studied in healthy male volunteers to understand how the body processes the medicine. PF-07799544 is in Phase 1 clinical development and is not yet approved.

What does PF-07799544 target?

PF-07799544 targets BRAF, a gene that can drive tumor growth when mutated. As a small molecule designed to act on this target, it is being evaluated in cancers such as melanoma and glioma where BRAF alterations are relevant. The drug is in Phase 1 trials to assess its safety and behavior in the body.

Who is developing PF-07799544?

PF-07799544 is being developed by Pfizer, Inc., a biopharmaceutical company listed on the New York Stock Exchange under the ticker PFE. The drug is currently in Phase 1 clinical trials, with studies active but not recruiting participants.

What phase is PF-07799544 in?

PF-07799544 is in Phase 1 clinical development. It is an investigational drug, meaning it has not been approved by regulatory authorities. Two Phase 1 trials are active but not recruiting: one in patients with advanced solid tumors and one in healthy male volunteers.

What clinical trials is PF-07799544 in?

PF-07799544 is being studied in two Phase 1 trials. NCT05538130 evaluates the drug as monotherapy or in combination in people with advanced solid tumors, including melanoma and glioma. NCT07578636 is a healthy volunteer study to understand how the body processes the medicine. Both trials are active but not recruiting.

Is PF-07799544 the same as Oral [14C] PF-07799544?

Yes, PF-07799544 is also known as Oral [14C] PF-07799544. The [14C] label indicates a radiolabeled version of the drug used in human absorption, distribution, metabolism, and excretion studies. This form is being tested in healthy male volunteers in trial NCT07578636.