Trial Outcomes & Findings for Relative Bioavailability Study of PF-07321332/Ritonavir Oral Powder Relative to the Commercial Tablets in Healthy Participants (NCT NCT05263921)

NCT ID: NCT05263921

Last Updated: 2024-06-06

Results Overview

Area under the plasma concentration time profile from time 0 extrapolated to infinity (AUCinf) was measured. 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.

Recruitment status

COMPLETED

Study phase

PHASE1

Target enrollment

12 participants

Primary outcome timeframe

0 (pre-dose), 0.5, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 48 and 72 hours post-dose on Day 1 of each period

Results posted on

2024-06-06

Participant Flow

This was a phase 1, open label, single dose, randomized, crossover study in healthy adult participants. A total of 12 participants were assigned to the study, participating in 4 study periods to receive 4 different treatments, and 11 participants completed the study and 1 participant discontinued from the study intervention due to family emergency.

Participant milestones

Participant milestones
Measure
Sequence 1: Treatment A-> B-> C-> D
Treatment A: Nirmatrelvir/ritonavir 300/100 mg commercial tablets. Treatment B: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water. Treatment C: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce. Treatment D: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding. All treatments were administered under fasted conditions, and a minimum of 4-day washout was planned between each treatment.
Sequence 2: Treatment B-> D-> A-> C
Treatment A: Nirmatrelvir/ritonavir 300/100 mg commercial tablets. Treatment B: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water. Treatment C: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce. Treatment D: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding. All treatments were administered under fasted conditions, and a minimum of 4-day washout was planned between each treatment.
Sequence 3: Treatment C-> A-> D-> B
Treatment A: Nirmatrelvir/ritonavir 300/100 mg commercial tablets. Treatment B: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water. Treatment C: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce. Treatment D: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding. All treatments were administered under fasted conditions, and a minimum of 4-day washout was planned between each treatment.
Sequence 4: Treatment D-> C-> B-> A
Treatment A: Nirmatrelvir/ritonavir 300/100 mg commercial tablets. Treatment B: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water. Treatment C: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce. Treatment D: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding. All treatments were administered under fasted conditions, and a minimum of 4-day washout was planned between each treatment.
Overall Study
STARTED
3
3
3
3
Overall Study
COMPLETED
3
3
2
3
Overall Study
NOT COMPLETED
0
0
1
0

Reasons for withdrawal

Reasons for withdrawal
Measure
Sequence 1: Treatment A-> B-> C-> D
Treatment A: Nirmatrelvir/ritonavir 300/100 mg commercial tablets. Treatment B: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water. Treatment C: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce. Treatment D: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding. All treatments were administered under fasted conditions, and a minimum of 4-day washout was planned between each treatment.
Sequence 2: Treatment B-> D-> A-> C
Treatment A: Nirmatrelvir/ritonavir 300/100 mg commercial tablets. Treatment B: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water. Treatment C: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce. Treatment D: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding. All treatments were administered under fasted conditions, and a minimum of 4-day washout was planned between each treatment.
Sequence 3: Treatment C-> A-> D-> B
Treatment A: Nirmatrelvir/ritonavir 300/100 mg commercial tablets. Treatment B: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water. Treatment C: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce. Treatment D: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding. All treatments were administered under fasted conditions, and a minimum of 4-day washout was planned between each treatment.
Sequence 4: Treatment D-> C-> B-> A
Treatment A: Nirmatrelvir/ritonavir 300/100 mg commercial tablets. Treatment B: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water. Treatment C: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce. Treatment D: Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding. All treatments were administered under fasted conditions, and a minimum of 4-day washout was planned between each treatment.
Overall Study
Other: family emergency.
0
0
1
0

Baseline Characteristics

Relative Bioavailability Study of PF-07321332/Ritonavir Oral Powder Relative to the Commercial Tablets in Healthy Participants

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
All Participants
n=12 Participant
All participants enrolled in the study.
Age, Continuous
42.25 Years
STANDARD_DEVIATION 12.800 • n=5 Participants
Sex: Female, Male
Female
4 Participants
n=5 Participants
Sex: Female, Male
Male
8 Participants
n=5 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
2 Participants
n=5 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
10 Participants
n=5 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants
n=5 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
n=5 Participants
Race (NIH/OMB)
Asian
1 Participants
n=5 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=5 Participants
Race (NIH/OMB)
Black or African American
4 Participants
n=5 Participants
Race (NIH/OMB)
White
7 Participants
n=5 Participants
Race (NIH/OMB)
More than one race
0 Participants
n=5 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
n=5 Participants

PRIMARY outcome

Timeframe: 0 (pre-dose), 0.5, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 48 and 72 hours post-dose on Day 1 of each period

Population: The analysis population refers to all participants dosed who had at least 1 of the PK parameters of primary interest.

Area under the plasma concentration time profile from time 0 extrapolated to infinity (AUCinf) was measured. 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.

Outcome measures

Outcome measures
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=12 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
AUCinf of Nirmatrelvir Following the Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles Under Fasted Conditions
28670 nanogram*hour per milliliter (ng*hr/mL)
Geometric Coefficient of Variation 36
30780 nanogram*hour per milliliter (ng*hr/mL)
Geometric Coefficient of Variation 25
33170 nanogram*hour per milliliter (ng*hr/mL)
Geometric Coefficient of Variation 33
36020 nanogram*hour per milliliter (ng*hr/mL)
Geometric Coefficient of Variation 27

PRIMARY outcome

Timeframe: 0 (pre-dose), 0.5, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 48 and 72 hours post-dose on Day 1 of each period

Population: The analysis population refers to all participants dosed who had at least 1 of the PK parameters of primary interest.

Area under the plasma concentration time profile from time 0 to the time of the last quantifiable concentration (Clast) was measured. AUClast was determined by Linear/Log trapezoidal method.

Outcome measures

Outcome measures
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=12 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
AUClast of Nirmatrelvir Following the Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles Under Fasted Conditions
27790 ng*hr/mL
Geometric Coefficient of Variation 36
30230 ng*hr/mL
Geometric Coefficient of Variation 27
32180 ng*hr/mL
Geometric Coefficient of Variation 33
35580 ng*hr/mL
Geometric Coefficient of Variation 27

PRIMARY outcome

Timeframe: 0 (pre-dose), 0.5, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 48 and 72 hours post-dose on Day 1 of each period

Population: The analysis population refers to all participants dosed who had at least 1 of the PK parameters of primary interest.

Maximum plasma concentration (Cmax) was measured. Cmax was observed directly from data.

Outcome measures

Outcome measures
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=12 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
Cmax of Nirmatrelvir Following the Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles Under Fasted Conditions
2817 nanogram per milliliter (ng/mL)
Geometric Coefficient of Variation 31
3254 nanogram per milliliter (ng/mL)
Geometric Coefficient of Variation 23
4025 nanogram per milliliter (ng/mL)
Geometric Coefficient of Variation 22
4572 nanogram per milliliter (ng/mL)
Geometric Coefficient of Variation 19

PRIMARY outcome

Timeframe: 0 (pre-dose), 0.5, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 48 and 72 hours post-dose on Day 1 of each period

Population: The analysis population refers to all participants dosed who had at least 1 of the PK parameters of primary interest.

Area under the plasma concentration time profile from time 0 extrapolated to infinity (AUCinf) was measured. 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.

Outcome measures

Outcome measures
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=12 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
AUCinf of Ritonavir Following the Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles Under Fasted Conditions
4843 ng*hr/mL
Geometric Coefficient of Variation 28
5414 ng*hr/mL
Geometric Coefficient of Variation 30
4979 ng*hr/mL
Geometric Coefficient of Variation 45
5271 ng*hr/mL
Geometric Coefficient of Variation 26

PRIMARY outcome

Timeframe: 0 (pre-dose), 0.5, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 48 and 72 hours post-dose on Day 1 of each period

Population: The analysis population refers to all participants dosed who had at least 1 of the PK parameters of primary interest.

Area under the plasma concentration time profile from time 0 to the time of the last quantifiable concentration (Clast) was measured. AUClast was determined by Linear/Log trapezoidal method.

Outcome measures

Outcome measures
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=12 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
AUClast of Ritonavir Following the Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles Under Fasted Conditions
4588 ng*hr/mL
Geometric Coefficient of Variation 29
5108 ng*hr/mL
Geometric Coefficient of Variation 32
4757 ng*hr/mL
Geometric Coefficient of Variation 46
4998 ng*hr/mL
Geometric Coefficient of Variation 26

PRIMARY outcome

Timeframe: 0 (pre-dose), 0.5, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 48 and 72 hours post-dose on Day 1 of each period

Population: The analysis population refers to all participants dosed who had at least 1 of the PK parameters of primary interest.

Maximum plasma concentration (Cmax) was measured. Cmax was observed directly from data.

Outcome measures

Outcome measures
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=12 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
Cmax of Ritonavir Following the Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles Under Fasted Conditions
536.9 ng/mL
Geometric Coefficient of Variation 41
598.2 ng/mL
Geometric Coefficient of Variation 42
579.8 ng/mL
Geometric Coefficient of Variation 45
640.5 ng/mL
Geometric Coefficient of Variation 30

SECONDARY outcome

Timeframe: Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.

Population: All participants who took at least 1 dose of study intervention.

Adverse events (AEs): any untoward medical occurrence in a clinical investigation participant administered a product, without regard to relatedness. Treatment-emergent AEs (TEAEs): AEs which occurred for the first time during the effective duration of treatment or AEs that increased in severity during treatment. Serious AEs (SAEs) were any untoward medical occurrence at any dose that resulted in death; was life-threatening; required inpatient hospitalization or caused prolongation of existing hospitalization; resulted in persistent or significant disability/incapacity (substantial disruption of the ability to conduction normal life functions). AEs included SAEs and non-serious AEs. Treatment-related TEAEs were any untoward medical occurrence attributed to study intervention. Relatedness to study intervention was determined by the investigator.

Outcome measures

Outcome measures
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=12 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
Number of Participants With Treatment-Emergent Adverse Event
All-causality TEAEs
6 Participants
2 Participants
1 Participants
4 Participants
Number of Participants With Treatment-Emergent Adverse Event
Treatment-related TEAEs
3 Participants
2 Participants
1 Participants
1 Participants

SECONDARY outcome

Timeframe: Screening, Period 1 Day -1, Period 4 Day 4 and early termination/discontinuation.

Population: All participants who took at least 1 dose of study intervention were included in the safety analysis set.

Participants analyzed in the laboratory abnormalities were with at least one observation of the given laboratory test while on study treatment or during lag time. Number of participants with laboratory abnormalities were number of participants with a laboratory abnormality meeting specified criteria while on study treatment or during lag time. Hematology, chemistry, urinalysis and other (SARS-CoV-2 RT-PCR, Urine drug screening, Pregnancy test (β hCG), eGFR \[CKD-EPI\], aPTT, PT-INR, Fibrinogen, At Screening only: FSH, HBsAg, HBsAb, HBcAb, HCVAb, HIV) were assessed.

Outcome measures

Outcome measures
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=3 Participants
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=2 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=4 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
n=3 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
Number of Participants With Laboratory Abnormalities
Urinalysis: pH (>8)
0 Participants
1 Participants
0 Participants
0 Participants
Number of Participants With Laboratory Abnormalities
Urinalysis: Urine hemoglobin (≥1)
1 Participants
0 Participants
0 Participants
0 Participants
Number of Participants With Laboratory Abnormalities
Urinalysis: Nitrite (≥1)
0 Participants
1 Participants
0 Participants
0 Participants
Number of Participants With Laboratory Abnormalities
Urinalysis: Leukocyte Esterase (≥1)
1 Participants
0 Participants
0 Participants
0 Participants

SECONDARY outcome

Timeframe: Screening, Day 1 of each period and early termination/discontinuation.

Population: All participants who took at least 1 dose of study intervention.

Participants with clinically significant vital sign values were with at least one observation of vital signs, which met pre-specified criteria while on study treatment or during lag time.

Outcome measures

Outcome measures
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=12 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
Number of Participants With Clinically Significant Vital Sign Values
0 Participants
0 Participants
0 Participants
0 Participants

SECONDARY outcome

Timeframe: Screening and Period 1 Day -1.

Population: All participants who took at least 1 dose of study intervention.

Participants with clinically significant physical examination values were with at least one observation of physical examination, which met pre-specified criteria while on study treatment or during lag time.

Outcome measures

Outcome measures
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=12 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
Number of Participants With Clinically Significant Physical Examination Values
0 Participants
0 Participants
0 Participants
0 Participants

SECONDARY outcome

Timeframe: Screening, Period 1 Day 1 and Period 4 Day 4.

Population: All participants who took at least 1 dose of study intervention.

Participants with clinically significant electrocardiogram (ECG) values were with at least one observation of ECG, which met pre-specified criteria while on study treatment or during lag time.

Outcome measures

Outcome measures
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=12 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
Number of Participants With Clinically Significant Abnormal Electrocardiogram Values
0 Participants
0 Participants
0 Participants
0 Participants

SECONDARY outcome

Timeframe: 1, 5, 10, 20 min after tasting each study intervention on Day 1 of each period.

Population: All participants who had tasted study interventions (in different vehicles) and made scores on the taste questionnaires were included in this analysis.

Participants reviewed the taste questionnaire and instructions prior to the first taste assessment to treatments (B, C, D) on Period 1 Day 1. Each participant completed the Taste Assessment Survey immediately following dosing (within 1 min) and at 5, 10, and 20 minutes post oral administration of PF-07321332/ritonavir oral powder. For the taste assessment in the study, the data used in the analysis were transcribed and rescaled to a score from 0 to 100 from the raw measurements on the Taste Assessment Questionnaire. The score of 0 was considered Favorable and the score of 100 was considered Not Favorable. Higher score means more unfavorable.

Outcome measures

Outcome measures
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=12 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
Taste Assessment of Mouth Feel After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
1 min
61.3 Units on a scale
Standard Deviation 31.25
53.5 Units on a scale
Standard Deviation 28.42
49.5 Units on a scale
Standard Deviation 31.30
Taste Assessment of Mouth Feel After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
5 min
63.2 Units on a scale
Standard Deviation 36.52
55.2 Units on a scale
Standard Deviation 32.56
57.5 Units on a scale
Standard Deviation 34.18
Taste Assessment of Mouth Feel After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
10 min
61.2 Units on a scale
Standard Deviation 35.96
52.5 Units on a scale
Standard Deviation 38.92
51.6 Units on a scale
Standard Deviation 37.29
Taste Assessment of Mouth Feel After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
20min
60.5 Units on a scale
Standard Deviation 35.06
52.0 Units on a scale
Standard Deviation 37.26
48.5 Units on a scale
Standard Deviation 35.41

SECONDARY outcome

Timeframe: 1, 5, 10, 20 min after tasting each study intervention on Day 1 of each period.

Population: All participants who had tasted study interventions (in different vehicles) and made scores on the taste questionnaires were included in this analysis.

Participants reviewed the taste questionnaire and instructions prior to the first taste assessment to treatments (B, C, D) on Period 1 Day 1. Each participant completed the Taste Assessment Survey immediately following dosing (within 1 min) and at 5, 10, and 20 minutes post oral administration of PF-07321332/ritonavir oral powder. For the taste assessment in the study, the data used in the analysis were transcribed and rescaled to a score from 0 to 100 from the raw measurements on the Taste Assessment Questionnaire. The score of 0 was considered Favorable and the score of 100 was considered Not Favorable. Higher score means more unfavorable.

Outcome measures

Outcome measures
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=12 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
Taste Assessment of Bitterness After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
1 min
75.4 Units on a scale
Standard Deviation 27.37
69.3 Units on a scale
Standard Deviation 34.39
63.2 Units on a scale
Standard Deviation 33.48
Taste Assessment of Bitterness After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
5 min
76.4 Units on a scale
Standard Deviation 29.15
65.0 Units on a scale
Standard Deviation 35.46
63.2 Units on a scale
Standard Deviation 34.91
Taste Assessment of Bitterness After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
10 min
69.8 Units on a scale
Standard Deviation 31.47
67.3 Units on a scale
Standard Deviation 35.16
64.6 Units on a scale
Standard Deviation 37.72
Taste Assessment of Bitterness After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
20min
73.4 Units on a scale
Standard Deviation 32.39
64.7 Units on a scale
Standard Deviation 34.15
61.4 Units on a scale
Standard Deviation 38.49

SECONDARY outcome

Timeframe: 1, 5, 10, 20 min after tasting each study intervention on Day 1 of each period.

Population: All participants who had tasted study interventions (in different vehicles) and made scores on the taste questionnaires were included in this analysis.

Participants reviewed the taste questionnaire and instructions prior to the first taste assessment to treatments (B, C, D) on Period 1 Day 1. Each participant completed the Taste Assessment Survey immediately following dosing (within 1 min) and at 5, 10, and 20 minutes post oral administration of PF-07321332/ritonavir oral powder. For the taste assessment in the study, the data used in the analysis were transcribed and rescaled to a score from 0 to 100 from the raw measurements on the Taste Assessment Questionnaire. The score of 0 was considered Favorable and the score of 100 was considered Not Favorable. Higher score means more unfavorable.

Outcome measures

Outcome measures
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=12 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
Taste Assessment of Tongue/Mouth Burn After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
1 min
42.5 Units on a scale
Standard Deviation 28.18
38.7 Units on a scale
Standard Deviation 30.57
31.2 Units on a scale
Standard Deviation 28.69
Taste Assessment of Tongue/Mouth Burn After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
5 min
45.5 Units on a scale
Standard Deviation 34.74
35.3 Units on a scale
Standard Deviation 30.52
35.0 Units on a scale
Standard Deviation 31.38
Taste Assessment of Tongue/Mouth Burn After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
10 min
43.7 Units on a scale
Standard Deviation 33.07
32.4 Units on a scale
Standard Deviation 30.46
37.6 Units on a scale
Standard Deviation 36.98
Taste Assessment of Tongue/Mouth Burn After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
20min
42.6 Units on a scale
Standard Deviation 35.50
33.8 Units on a scale
Standard Deviation 30.76
36.6 Units on a scale
Standard Deviation 31.50

SECONDARY outcome

Timeframe: 1, 5, 10, 20 min after tasting each study intervention on Day 1 of each period.

Population: All participants who had tasted study interventions (in different vehicles) and made scores on the taste questionnaires were included in this analysis.

Participants reviewed the taste questionnaire and instructions prior to the first taste assessment to treatments (B, C, D) on Period 1 Day 1. Each participant completed the Taste Assessment Survey immediately following dosing (within 1 min) and at 5, 10, and 20 minutes post oral administration of PF-07321332/ritonavir oral powder. For the taste assessment in the study, the data used in the analysis were transcribed and rescaled to a score from 0 to 100 from the raw measurements on the Taste Assessment Questionnaire. The score of 0 was considered Favorable and the score of 100 was considered Not Favorable. Higher score means more unfavorable.

Outcome measures

Outcome measures
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=12 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
Taste Assessment of Throat Burn After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
1 min
37.4 Units on a scale
Standard Deviation 29.85
34.6 Units on a scale
Standard Deviation 32.15
27.6 Units on a scale
Standard Deviation 24.17
Taste Assessment of Throat Burn After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
5 min
42.6 Units on a scale
Standard Deviation 32.04
29.7 Units on a scale
Standard Deviation 29.61
34.9 Units on a scale
Standard Deviation 31.35
Taste Assessment of Throat Burn After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
10 min
40.7 Units on a scale
Standard Deviation 31.09
30.7 Units on a scale
Standard Deviation 29.63
39.5 Units on a scale
Standard Deviation 38.53
Taste Assessment of Throat Burn After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
20min
40.5 Units on a scale
Standard Deviation 33.32
32.5 Units on a scale
Standard Deviation 29.41
40.3 Units on a scale
Standard Deviation 35.70

SECONDARY outcome

Timeframe: 1, 5, 10, 20 min after tasting each study intervention on Day 1 of each period.

Population: All participants who had tasted study interventions (in different vehicles) and made scores on the taste questionnaires were included in this analysis.

Participants reviewed the taste questionnaire and instructions prior to the first taste assessment to treatments (B, C, D) on Period 1 Day 1. Each participant completed the Taste Assessment Survey immediately following dosing (within 1 min) and at 5, 10, and 20 minutes post oral administration of PF-07321332/ritonavir oral powder. For the taste assessment in the study, the data used in the analysis were transcribed and rescaled to a score from 0 to 100 from the raw measurements on the Taste Assessment Questionnaire. The score of 0 was considered Favorable and the score of 100 was considered Not Favorable. Higher score means more unfavorable.

Outcome measures

Outcome measures
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=12 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=11 Participants
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
Taste Assessment of Overall Liking After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
20min
75.2 Units on a scale
Standard Deviation 32.14
65.0 Units on a scale
Standard Deviation 35.98
63.9 Units on a scale
Standard Deviation 40.19
Taste Assessment of Overall Liking After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
1 min
77.9 Units on a scale
Standard Deviation 28.53
62.5 Units on a scale
Standard Deviation 33.89
61.8 Units on a scale
Standard Deviation 34.69
Taste Assessment of Overall Liking After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
5 min
78.2 Units on a scale
Standard Deviation 30.28
67.0 Units on a scale
Standard Deviation 34.27
66.5 Units on a scale
Standard Deviation 38.34
Taste Assessment of Overall Liking After Administration of Nirmatrelvir/Ritonavir in Different Delivery Vehicles
10 min
77.9 Units on a scale
Standard Deviation 30.83
67.5 Units on a scale
Standard Deviation 37.16
64.6 Units on a scale
Standard Deviation 38.99

Adverse Events

Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets

Serious events: 0 serious events
Other events: 6 other events
Deaths: 0 deaths

Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water

Serious events: 0 serious events
Other events: 2 other events
Deaths: 0 deaths

Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce

Serious events: 0 serious events
Other events: 1 other events
Deaths: 0 deaths

Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding

Serious events: 0 serious events
Other events: 4 other events
Deaths: 0 deaths

Serious adverse events

Adverse event data not reported

Other adverse events

Other adverse events
Measure
Nirmatrelvir/Ritonavir 300/100 mg Commercial Tablets
n=11 participants at risk
Nirmatrelvir/ritonavir 300/100 mg commercial tablets were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Water
n=11 participants at risk
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with water were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Applesauce
n=12 participants at risk
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with applesauce were administered under fasted conditions.
Nirmatrelvir/Ritonavir 300/100 mg Oral Powder Mixed With Vanilla Pudding
n=11 participants at risk
Nirmatrelvir/ritonavir 300/100 mg oral powder mixed with vanilla pudding were administered under fasted conditions.
Gastrointestinal disorders
Diarrhoea
9.1%
1/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/12 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
Gastrointestinal disorders
Gastritis
9.1%
1/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/12 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
Gastrointestinal disorders
Nausea
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
8.3%
1/12 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
9.1%
1/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
Nervous system disorders
Dysgeusia
9.1%
1/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
18.2%
2/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
8.3%
1/12 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
9.1%
1/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
Gastrointestinal disorders
Abdominal pain upper
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/12 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
9.1%
1/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
Gastrointestinal disorders
Dry mouth
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/12 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
9.1%
1/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
General disorders
Vessel puncture site bruise
9.1%
1/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/12 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
General disorders
Vessel puncture site pain
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/12 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
9.1%
1/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
Injury, poisoning and procedural complications
Incision site complication
9.1%
1/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/12 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
Musculoskeletal and connective tissue disorders
Arthralgia
9.1%
1/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/12 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
Nervous system disorders
Headache
18.2%
2/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/12 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
9.1%
1/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
Nervous system disorders
Paraesthesia
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/12 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
9.1%
1/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
Nervous system disorders
Tension headache
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/12 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
9.1%
1/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
Reproductive system and breast disorders
Vulvovaginal burning sensation
9.1%
1/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/12 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
Skin and subcutaneous tissue disorders
Dry skin
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
0.00%
0/12 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.
9.1%
1/11 • Baseline up to Follow-up (35 days after last dose administration), an average of 10 weeks.

Additional Information

Pfizer ClinicalTrials.gov Call Center

Pfizer Inc.

Phone: 1-800-718-1021

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place