The purpose of this study is to learn how Itraconazole affects the blood level of PF-07817883 in Healthy Adults. This study is seeking participants who are: * male and female aged 18 to 65 years old, * overtly healthy. This can be determined my medical evaluation, medical history, lab tests etc. This study will consist of 2 parts, Period 1 and Period 2. Period 1: participants will take PF-07817883 one time by mouth at the study clinic. Period 2: participants will take PF-07817883 one time by mouth at the study clinic. They will also take daily itraconazole by mouth for 7 days. Participants will stay at the study clinic for 2 weeks in total. The study doctors will collect blood and urine samples from everyone. The study doctors will check participants' reactions to the study medicine for safety measures. There is a follow-up call at 28 to 35 days from the last dose of PF-07817883. Itraconazole is an approved medicine. It is also a metabolism inhibitor. When taken with some medicines, it affects the actual level of these medicines in the body. This study will compare blood levels of PF-07817883 given with and without Itraconazole. This will help decide safety and right amount for PF-07817883 when given with metabolism inhibitors.
This is a Phase 1, open-label, 2-period, fixed sequence study to estimate the effect of itraconazole, a strong CYP3A4 inhibitor, on the plasma PK of PF-07817883 in healthy adults. The study will consist of 2 treatments: a single oral dose of PF-07817883 alone and a single oral dose of PF-07817883 in combination with multiple oral doses of itraconazole. The PK and safety will be assessed and compared for single dose of PF-07817883 in period 1 and period 2.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
12
Single oral dose (period 1) or co-administered with itraconazole (period 2)
Interacting drug which will be given for 7 days in period 2
New Haven Clinical Research Unit
New Haven, Connecticut, United States
Maximum Observed Concentration (Cmax) of PF-07817883
Cmax was observed directly from data and measured in nanogram per milliliter (ng/mL).
Time frame: Period 1: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 48, 72 and 96 hours post dose on Day 1; Period 2: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 48, 72 and 96 hours post dose on Day 4
Area Under the Concentration -Time Curve From Time Zero (0) Extrapolated to Infinite Time (AUCinf) of PF-07817883
AUCinf was derived by AUClast + (Clast\*/kel). AUClast was area under the plasma concentration-time profile from time 0 to the time of Clast; Clast\* was the predicted plasma concentration at the last quantifiable time point from the log-linear regression analysis and kel was the terminal phase rate constant calculated by a linear regression of the loglinear concentration-time curve. AUCinf was measured in nanogram\*hour per milliliter (ng\*hr/mL).
Time frame: Period 1: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 48, 72 and 96 hours post dose on Day 1; Period 2: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 48, 72 and 96 hours post dose on Day 4
Number of Participants With Treatment Emergent Adverse Events (TEAEs)
An adverse event (AE) was any untoward medical occurrence in a participant or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. A serious AE was any untoward medical occurrence at any dose that resulted in death; was life-threatening; required hospitalization or prolongation of existing hospitalization; resulted in persistent or significant disability/incapacity; resulted in congenital anomaly/birth defect, was a suspected transmission via a Pfizer product of an infectious agent, pathogenic or non-pathogenic. TEAEs were events that occurred between first dose of study intervention and up to maximum of 35 days after last dose that were absent before treatment or that worsened relative to pretreatment state.
Time frame: Day 1 of dosing up to 35 days post last dose of study intervention (maximum up to 48 days)
Number of Participants With Laboratory Test Abnormalities
Laboratory assessments included: hematology assessments included monocytes/leukocytes (percentage \[%\]) greater than (\>) 1.2\*upper limit of normal (ULN), urinalysis assessments included urine hemoglobin greater than or equal to (\>=) 1, low power field (LPF), urine bacteria \>20/LPF.
Time frame: Day 1 of dosing up to last dose of study intervention or early termination/discontinuation (maximum up to 13 days)
Number of Participants With Electrocardiogram (ECG) Findings Per Pre-defined Criteria
Standard 12-lead ECGs was collected using an ECG system that automatically calculates the heart rate (HR) and measures PR interval, QT interval, QTcF, and QRS interval. All scheduled ECGs were performed after the participant had rested quietly for at least 5 minutes in a supine position. To ensure safety of the participants, a qualified individual at the investigator site made comparisons to baseline measurements. Pre-defined criteria was defined as 30 milliseconds (ms) less than (\<) change less than or equal to (\<=) 60 ms.
Time frame: Day 1 of dosing up to last dose of study intervention or early termination/discontinuation (maximum up to 13 days)
Number of Participants With Vital Signs Findings Per Pre-defined Criteria
Vital signs included: supine diastolic blood pressure (DBP) measured in millimetre of mercury (mmHg) with criteria value as follows- Value \<50 mmHg, change\>= 20 mmHg increase, change \>= 20 mmHg decrease; supine pulse rate (PR) measured in beats per minute (bpm) with criteria values as follows- value \< 40 bpm, value \> 120 bpm; supine systolic blood pressure (SBP, mmHg) with criteria values as follows- value\< 90 mmHg, change \>= 30 mmHg increase, change \>=30 mmHg decrease. Vital signs (SBP BP, and pulse rate) were measured with participants after having a rest for at least 5 minutes in a supine position. Supine BP was measured with the participant's arm supported at the level of the heart and recorded to the nearest mmHg after approximately 5 minutes of rest. If timing of these measurements coincided with a blood collection, BP and PR were obtained prior to nominal time of blood collection. Only participants having at least 1 vital sign findings per pre-defined criteria are reported.
Time frame: Day 1 of dosing up to last dose of study intervention or early termination/discontinuation (maximum up to 13 days)
Number of Participants With Clinically Significant Abnormalities in Physical Examination
A complete physical examination included, at a minimum, head, ears, eyes, nose, mouth, skin, heart and lung examinations, lymph nodes, and gastrointestinal, musculoskeletal, and neurological systems. A brief physical examination included, at a minimum, assessments of general appearance, the respiratory and CV systems, and participant-reported symptoms. Physical examinations were conducted by a physician, trained physician's assistant, or nurse practitioner as acceptable according to local regulation. Clinical significance of physical examination abnormalities was judged by physicians.
Time frame: Day 1 of dosing up to last dose of study intervention or early termination/discontinuation (maximum up to 13 days)
Time to Reach Cmax (Tmax) of PF-07817883
Tmax is the time taken (in hours) to reach the maximum serum drug concentration. Tmax was observed directly from data as time of first occurrence.
Time frame: Period 1: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 48, 72 and 96 hours post dose on Day 1; Period 2: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 48, 72 and 96 hours post dose on Day 4
Terminal Phase Half-Life (t1/2) of PF-07817883
Terminal half-life was defined as the time measured for the plasma concentration of drug to decrease by one half. t1/2 was determined by Loge(2)/kel, where kel was the terminal phase rate constant calculated by a linear regression of the loglinear concentration-time curve.
Time frame: Period 1: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 48, 72 and 96 hours post dose on Day 1; Period 2: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 48, 72 and 96 hours post dose on Day 4
Apparent Clearance (CL/F) of PF-07817883
Clearance of a drug is a measure of the rate at which a drug is metabolized or eliminated by normal biological processes. CL/F was calculated as dose administered divided by area under the concentration curve from time 0 extrapolated to infinite time (AUCinf).
Time frame: Period 1: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 48, 72 and 96 hours post dose on Day 1; Period 2: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 48, 72 and 96 hours post dose on Day 4
Apparent Volume of Distribution (Vz/F) of PF-07817883
Volume of distribution is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired plasma concentration of a drug.
Time frame: Period 1: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 48, 72 and 96 hours post dose on Day 1; Period 2: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 48, 72 and 96 hours post dose on Day 4
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