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Tafamidis free acid

Phase 1

Undisclosed | Small molecule | Other |Pfizer, Inc.|Trials Updated: May 28, 2025

Tafamidis free acid target and mechanism

Molecular targetTTR
Target classStabiliser
ModalitySmall molecule

Also known as Tafamidis free acid tablet (Test), Tafamidis free acid tablet

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLED
Total Trials5
Total Enrollment91

FDA Designations

No designations recorded

Tafamidis free acid clinical trials

Tafamidis free acid · 5 trials · 1 indication

Phase 1 5
NCT06705569A Study to Compare Two Forms of Study Medicine Tafamidis in the Blood in Healthy AdultsHealthy
COMPLETED22 Analytics
NCT06273839A Study to Learn How Different Forms of Study Medicine Tafamidis Are Taken Up Into The Blood in Healthy AdultsHealthy
COMPLETED12 Analytics
NCT05498701A Study Comparing Two Forms of Tafamidis Without Food and the Amount of Tafamidis in the Blood With FoodHealthy
COMPLETED22 Analytics
NCT05482308A Study to Compare Two Tablet Forms of Tafamidis in Healthy ParticipantsHealthy
COMPLETED12 Analytics
NCT04575116A Study to Determine the Bioequivalence of Two Doses of TafamidisHealthy
COMPLETED23 Analytics
PHASE1COMPLETED
A Study to Compare Two Forms of Study Medicine Tafamidis in the Blood in Healthy Adults
HealthyUnlock trial analytics
PHASE1COMPLETED
A Study to Learn How Different Forms of Study Medicine Tafamidis Are Taken Up Into The Blood in Healthy Adults
HealthyUnlock trial analytics
PHASE1COMPLETED
A Study Comparing Two Forms of Tafamidis Without Food and the Amount of Tafamidis in the Blood With Food
HealthyUnlock trial analytics
PHASE1COMPLETED
A Study to Compare Two Tablet Forms of Tafamidis in Healthy Participants
HealthyUnlock trial analytics
PHASE1COMPLETED
A Study to Determine the Bioequivalence of Two Doses of Tafamidis
HealthyUnlock trial analytics

Study Endpoints

Primary Endpoints

Area under the concentration-time curve (AUCinf)
Hour 0, 0.5, 1, 2, 3, 4, 6, 8, 12, 24, 48, 72, 96, 120, 144, 168

Area under the plasma concentration time profile from time zero extrapolated to infinite time

Maximum observed plasma concentration (Cmax)
Hour 0, 0.5, 1, 2, 3, 4, 6, 8, 12, 24, 48, 72, 96, 120, 144, 168

Peak or maximum observed concentration

Pharmacokinetics(PK) Parameter - Area Under the Concentration-time Curve to Infinity (AUCinf) of PF-06291826
Predose and 0.5, 1,2,3,4,6,8,12,24 (Day 2),48 (Day 3),72 (Day 4),96 (Day 5),120 (Day 6),144 (Day 7), and 168 (Day 8) hours post dose

AUCinf is defined as area under the concentration-time curve from time 0 to infinity, and calculated by AUC(0-tlast) + (Clast\*/kel), where Clast\* is the estimated plasma concentration at the last quantifiable time point (Clast) estimated form the log-linear regression analysis Clast\* = Clast x e\^(-kel x tlast)

PK Parameter - Maximum Observed Concentration (Cmax) of PF-06291826
Predose and 0.5, 1,2,3,4,6,8,12,24 (Day 2),48 (Day 3),72 (Day 4),96 (Day 5),120 (Day 6),144 (Day 7), and 168 (Day 8) hours post dose

Cmax is defined as maximum observed concentration.

Area Under the Plasma Concentration-time Profile From Time Zero Extrapolated to Infinite Time (AUCinf) of Tafamidis (Both Variant 12.2 mg Tafamidis Free Acid Tablet and Proposed Commercial 12.2 mg Tafamidis Free Acid Tablet)
Days 1 (Pre-dose,0.5,1,2,3,4,6,8,12 hours post dose),2,3,4,5,6,7 and 8 in both Periods 1 and 2.

The AUCinf was determined by AUClast+ (Clast\*/kel), where Clast\* is the predicted plasma concentration at the last quantifiable time point estimated from the log-linear regression analysis; kel is the terminal phase rate constant calculated by a linear regression of the log-linear concentration-time curve.

Maximum Plasma Concentration (Cmax) of Tafamidis (Both Variant 12.2 mg Tafamidis Free Acid Tablet and Proposed Commercial 12.2 mg Tafamidis Free Acid Tablet)
Days 1 (Pre-dose,0.5,1,2,3,4,6,8,12 hours post dose),2,3,4,5,6,7 and 8 in both Periods 1 and 2.

Cmax was observed directly from data.

Secondary Endpoints

Number or percentage of patients with abnormal physical examination findings
Baseline up to Day 25
Number or percentage of patients with change from baseline in Clinical Laboratory parameters
Baseline up to Day 25
Number or percentage of patients with change from baseline in Vital sign measurements
Baseline up to Day 25
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelCROSSOVER
PurposeBASIC_SCIENCE

Treatment Arms

ArmTypeDescription
Test tablet followed by Reference capsuleEXPERIMENTALOn Day 1 of each period, participants will receive a single dose of 1 of the tafamidis formulations. Each period is separated by a washout of at least 16 days between administration of study drug
Reference capsule followed by Test tabletEXPERIMENTALOn Day 1 of each period, participants will receive a single dose of 1 of the tafamidis formulations. Each period is separated by a washout of at least 16 days between administration of study drug
Test 1 tablet followed by Test 2 tablet followed by Reference capsuleEXPERIMENTALOn Day 1 of each period, participants will receive a single dose of 1 of the tafamidis formulations. Each period is separated by a washout of at least 16 days between administration of study drug
Test 1 tablet followed by Reference capsule followed by Test 2 tabletEXPERIMENTALOn Day 1 of each period, participants will receive a single dose of 1 of the tafamidis formulations. Each period is separated by a washout of at least 16 days between administration of study drug
Test 2 tablet followed by Reference capsule followed by Test 1 tabletEXPERIMENTALOn Day 1 of each period, participants will receive a single dose of 1 of the tafamidis formulations. Each period is separated by a washout of at least 16 days between administration of study drug
Test 2 tablet followed by Test 1 tablet followed by Reference capsuleEXPERIMENTALOn Day 1 of each period, participants will receive a single dose of 1 of the tafamidis formulations. Each period is separated by a washout of at least 16 days between administration of study drug
Reference capsule followed by Test 1 tablet followed by Test 2 tabletEXPERIMENTALOn Day 1 of each period, participants will receive a single dose of 1 of the tafamidis formulations. Each period is separated by a washout of at least 16 days between administration of study drug
Reference capsule followed by Test 2 tablet followed by Test 1 tabletEXPERIMENTALOn Day 1 of each period, participants will receive a single dose of 1 of the tafamidis formulations. Each period is separated by a washout of at least 16 days between administration of study drug
Test tablet (fasted) followed by Reference capsule (fasted) followed by Test tablet (fed)EXPERIMENTALOn Day 1 of each period, participants will receive a single dose of one of the tafamidis formulations under fasted or fed conditions. Each period is separated by a washout of at least 16 days between administration of study drug.
Reference capsule (fasted) followed by Test tablet (fasted) followed by Test tablet (fed)EXPERIMENTALOn Day 1 of each period, participants will receive a single dose of one of the tafamidis formulations under fasted or fed conditions. Each period is separated by a washout of at least 16 days between administration of study drug.
Test tablet followed by Reference tabletEXPERIMENTALOn Day 1 of each period, participants will receive a single dose of 1 of the tafamidis formulations. Each period is separated by a washout of at least 16 days between administration of study drug.
Reference tablet followed by Test tabletEXPERIMENTALOn Day 1 of each period, participants will receive a single dose of 1 of the tafamidis formulations. Each period is separated by a washout of at least 16 days between administration of study drug
Tafamidis Free acid tablet then tafamidis meglumine capsuleEXPERIMENTALOn Day 1 of each period, participants will receive a single dose of 1 of tafamidis formulations. Each period is separated by a washout of at least 16 days between administration of study drug.
Tafamidis meglumine capsule then Tafamidis Free acid tabletEXPERIMENTALOn Day 1 of each period, participants will receive a single dose of 1 of tafamidis formulations. Each period is separated by a washout of at least 16 days between administration of study drug.

Interventions

NameTypeDescription
Tafamidis 61 mg free acid tablet (Test)DRUGTafamidis 61 mg free acid tablet (Test)
Tafamidis 61 mg free acid capsule (Reference)DRUGTafamidis 61 mg free acid capsule (Reference)
Tafamidis 61 mg free acid tablet (Test 1)DRUGTafamidis 61 mg free acid tablet (Test 1)
Tafamidis 70 mg free acid tablet (Test 1)DRUGTafamidis 61 mg free acid tablet (Test 1)
Tafamidis free acid tablet (Test)DRUG12.2 mg tafamidis free acid tablet (Test)
Tafamidis meglumine capsule (Reference)DRUGCommercial 20 mg tafamidis meglumine capsule (Reference)
Tafamidis free acid tablet (Reference)DRUGProposed commercial 12.2 mg tafamidis free acid tablet (Reference)
Tafamidis free acid tabletDRUG12.2 mg tafamidis free acid tablet
Tafamidis meglumine capsuleDRUG20 mg tafamidis meglumine soft gelatin capsule
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: Age and Sex: 1. Participants aged 18 years or older (or the minimum age of consent in accordance with local regulations) at screening. 2. Healthy female participants of nonchildbearing potential and/or male participants who are overtly healthy as determined by medical evaluatio...

Countries:BelgiumCanadaUnited States
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Frequently asked questions about Tafamidis free acid

What is tafamidis free acid?

Tafamidis free acid is a small molecule drug developed by Pfizer, Inc. (PFE). It is a stabiliser that targets the TTR protein. The specific indication for this free acid form is undisclosed, and it is currently in Phase 1 clinical development.

What does tafamidis free acid target?

Tafamidis free acid targets the TTR protein. It belongs to the stabiliser class, meaning it works by stabilising the TTR protein. This mechanism is being investigated in Phase 1 trials.

Who makes tafamidis free acid?

Tafamidis free acid is developed by Pfizer, Inc., which trades under the ticker symbol PFE. Pfizer is the sponsor of the clinical trials for this drug.

What phase is tafamidis free acid in?

Tafamidis free acid is in Phase 1 clinical development. It is an investigational drug and has not been approved by the FDA. All five of its clinical trials have been completed.

What clinical trials is tafamidis free acid in?

Tafamidis free acid has been studied in five completed Phase 1 trials, including NCT06705569, NCT06273839, NCT05498701, and NCT05482308. These trials enrolled healthy adult volunteers in Belgium and Canada to compare different forms of tafamidis.