Clinical trial NCT06705569: A Study to Compare Two Forms of Study Medicine Tafamidis in the Blood in Healthy Adults
Official title: A PHASE 1, OPEN-LABEL, RANDOMIZED, CROSSOVER, SINGLE DOSE, PIVOTAL BIOEQUIVALENCE STUDY TO COMPARE TAFAMIDIS FREE ACID TABLET AND COMMERCIAL TAFAMIDIS FREE ACID CAPSULE ADMINISTERED UNDER FASTED CONDITIONS IN HEALTHY ADULT PARTICIPANTS
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE1
Conditions: Healthy
Keywords: tafamidis
Lead sponsor: Pfizer
Sponsor class: INDUSTRY
First posted: 2024-11-26
Enrollment: 22
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: CROSSOVER
Primary purpose: BASIC_SCIENCE

Brief summary: The purpose of this clinical trial is to compare the amount of tafamidis in the blood of healthy adult participants after taking two different forms of tafamidis by mouth.

Detailed description: A new tafamidis free acid tablet is being developed to be bioequivalent to the current commercial 61 mg tafamidis free acid capsule. The purpose of the study is to establish the bioequivalence of 61 mg tafamidis free acid tablet (Test) to 61 mg tafamidis free acid capsule (Reference, the clinical supply form of the current commercial 61 mg tafamidis free acid capsule) administered under fasted conditions in healthy adult participants.

Eligibility criteria: 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 evaluation including medical history, physical examination including blood pressure, pulse rate and standard 12 lead ECG, and laboratory tests.

   Other Inclusion Criteria:
3. BMI of 16-32 kg/m2; and a total body weight \>45 kg (99 lb).
4. Evidence of a personally signed and dated informed consent document indicating that the subject has been informed of all pertinent aspects of the study.

Exclusion Criteria:

Medical Conditions:

1. 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).

   * Any condition possibly affecting drug absorption (eg, gastrectomy, cholecystectomy).
   * History of HIV infection, hepatitis B, or hepatitis C; positive testing for HIV, HBsAg, HBcAb or HCVAb. Hepatitis B vaccination is allowed.
   * Hypersensitivity to any component of the formulations.
2. Any medical or psychiatric condition including recent (within the past year) or active suicidal ideation/behavior or laboratory abnormality or other conditions that may increase the risk of study participation or, in the investigator's judgment, make the participant inappropriate for the study.

   Prior/Concomitant Therapy:
3. 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.
4. Current use of any prohibited concomitant medication(s) or participant unwilling or unable to use a required concomitant medication(s).

   Prior/Concurrent Clinical Study Experience:
5. Previous administration of an investigational product (drug or vaccine) within 30 days (or as determined by the local requirement) or 5 half-lives preceding the first dose of study intervention used in this study (whichever is longer).

   Diagnostic Assessments:
6. A positive urine drug test. A single repeat for positive drug screen may be allowed.
7. Screening supine BP ≥140 mm Hg (systolic) or ≥90 mm Hg (diastolic) for participants \<60 years; and ≥150/90 mm/Hg for participants ≥60 years old, following at least 5 minutes of supine rest. If systolic BP is ≥140 or 150 mm Hg (based on age) or diastolic ≥90 mm Hg, the BP should be repeated 2 more times and the average of the 3 BP values should be used to determine the participant's eligibility.
8. Standard 12 lead ECG that demonstrates clinically relevant abnormalities that may affect participant safety or interpretation of study results (eg, QTcF \>450 ms, complete LBBB, signs of an acute or indeterminate age myocardial infarction, ST T interval changes suggestive of myocardial ischemia, second or third degree AV block, or serious bradyarrhythmias or tachyarrhythmias). If QTcF exceeds 450 ms, or QRS exceeds 120 ms, the ECG should be repeated twice and the average of the 3 QTcF or QRS values used to determine the participant's eligibility. Computer-interpreted ECGs should be overread by a physician experienced in reading ECGs before excluding a participant.
9. Renal impairment as defined by an eGFR of \<60 mL/min/1.73 m².
10. Participants with ANY of the following abnormalities in clinical laboratory tests at screening, as assessed by the study specific laboratory and confirmed by a single repeat test, if deemed necessary:

    • ALT, AST, Bilirubin ≥1.5 × ULN. Participants with a history of Gilbert's syndrome may have direct bilirubin measured and would be eligible for this study provided the direct bilirubin level is ≤ULN.

    Other Exclusion Criteria:
11. History of alcohol abuse or binge drinking and/or any other illicit drug use or dependence within 6 months of Screening. Binge drinking is defined as a pattern of 5 (male) and 4 (female) or more alcoholic drinks in about 2 hours. As a general rule, alcohol intake should not exceed 14 units per week (1 unit = 8 ounces (240 mL) beer, 1 ounce (30 mL) of 40% spirit, or 3 ounces (90 mL) of wine).
12. Unwilling or unable to comply with the criteria in the Lifestyle Considerations section of this protocol.
13. Investigator site staff directly involved in the conduct of the study and their family members, site staff otherwise supervised by the investigator, and sponsor and sponsor delegate employees directly involved in the conduct of the study and their family members.
14. Use of tobacco or nicotine-containing products in excess of the equivalent of 5 cigarettes per day.

Primary outcomes:
measure: Area under the concentration-time curve (AUCinf)
timeFrame: Hour 0, 0.5, 1, 2, 3, 4, 6, 8, 12, 24, 48, 72, 96, 120, 144, 168
measure: Maximum observed plasma concentration (Cmax)
timeFrame: Hour 0, 0.5, 1, 2, 3, 4, 6, 8, 12, 24, 48, 72, 96, 120, 144, 168
Secondary outcomes:
measure: Number or percentage of patients with abnormal physical examination findings
timeFrame: Baseline up to Day 25
measure: Number or percentage of patients with change from baseline in Clinical Laboratory parameters
timeFrame: Baseline up to Day 25
measure: Number or percentage of patients with change from baseline in Vital sign measurements
timeFrame: Baseline up to Day 25
measure: Number of patients with change in ECG parameters
timeFrame: Baseline up to Day 25
measure: Incidence of adverse events
timeFrame: Baseline up to Day 53
Other outcomes:
Locations:
city: Brussels
country: Belgium
facility: Pfizer Clinical Research Unit - Brussels
state: Bruxelles-capitale, Région DE
Study officials:
affiliation: Pfizer
name: Pfizer CT.gov Call Center
role: STUDY_DIRECTOR
References: