Clinical trial NCT05525910: Relative Bioavailability Study of Nirmatrelvir/Ritonavir 4 Different Fixed Dose Combination Tablets Relative to the Commercial Tablets in Healthy Participants
Official title: A Phase 1, Open-Label, Randomized, Single Dose, Crossover Study to Estimate the Relative Bioavailability of Nirmatrelvir and Ritonavir Following Oral Administration of 4 Different Fixed Dose Combination Tablet Formulations Relative to The Commercial Tablet Formulation in Healthy Adult Participants Under Fasted Conditions
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE1
Conditions: Biological Availability
Healthy Participants
Keywords: Coronavirus disease 2019 (COVID-19)
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
Nirmatrelvir
Paxlovid
Lead sponsor: Pfizer
Sponsor class: INDUSTRY
First posted: 2022-09-02
Enrollment: 15
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 study is to estimate the relative bioavailability of nirmatrelvir/ritonavir of 4 different FDC tablet formulations relative to the commercial tablet formulation under fasted conditions in healthy adult participants.


Eligibility criteria: Inclusion Criteria:

* Participants who are overtly healthy as determined by medical evaluation including medical history, physical examination (PE), laboratory tests, vital signs and standard 12 lead ECGs.
* Body mass index (BMI) of 17.5 to 30.5 kg/m2; and a total body weight \>50 kg (110 lb).
* Participants who are willing and able to comply with all scheduled visits, treatment plan, laboratory tests, lifestyle considerations, and other study procedures

Exclusion Criteria:

* Positive test result for SARS-CoV-2 infection at the time of Screening or Day -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).
* Clinically relevant abnormalities requiring treatment (eg, acute myocardial infarction, unstable ischemic conditions, evidence of ventricular dysfunction, serious tachy or brady arrhythmias) or indicating serious underlying heart disease (eg, prolonged PR interval, cardiomyopathy, heart failure greater than New York Heart Association (NYHA) 1, underlying structural heart disease, Wolff Parkinson-White syndrome).
* Any condition possibly affecting drug absorption (eg, gastrectomy, cholecystectomy).
* History of human immunodeficiency virus (HIV) infection, hepatitis B, or hepatitis C; positive testing for HIV, hepatitis B surface antigen (HBsAg), or hepatitis B surface antibody (HCVAb). Hepatitis B vaccination is allowed.
* 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.
* Participant who have received a COVID-19 vaccine within 7 days before screening or admission, or who are to be vaccinated with a COVID-19 vaccine at any time during the study confinement period.
* A positive urine drug test.

Primary outcomes:
measure: AUCinf of Nirmatrelvir Following the Administration of 4 Different Nirmatrelvir/Ritonavir FDC Tablets (Test Formulations) Compared to the Nirmatrelvir/Ritonavir 300(2*150)/100 mg Tablets (Reference Formulation)
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 treatment period
measure: AUClast of Nirmatrelvir Following the Administration of 4 Different Nirmatrelvir/Ritonavir FDC Tablets (Test Formulations) Compared to the Nirmatrelvir/Ritonavir 300(2*150)/100 mg Tablets (Reference Formulation)
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 treatment period
measure: Cmax of Nirmatrelvir Following the Administration of 4 Different Nirmatrelvir/Ritonavir FDC Tablets (Test Formulations) Compared to the Nirmatrelvir/Ritonavir 300(2*150)/100 mg Tablets (Reference Formulation)
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 treatment period
measure: AUCinf of Ritonavir Following the Administration of 4 Different Nirmatrelvir/Ritonavir FDC Tablets (Test Formulations) Compared to the Nirmatrelvir/Ritonavir 300(2*150)/100 mg Tablets (Reference Formulation)
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 treatment period
measure: AUClast of Ritonavir Following the Administration of 4 Different Nirmatrelvir/Ritonavir FDC Tablets (Test Formulations) Compared to the Nirmatrelvir/Ritonavir 300(2*150)/100 mg Tablets (Reference Formulation)
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 treatment period
measure: Cmax of Ritonavir Following the Administration of 4 Different Nirmatrelvir/Ritonavir FDC Tablets (Test Formulations) Compared to the Nirmatrelvir/Ritonavir 300(2*150)/100 mg Tablets (Reference Formulation)
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 treatment period
Secondary outcomes:
measure: Number of Participants With All-Causality and Treatment-Related TEAEs
timeFrame: From the first dose of study treatment up to 35 days after last dose of study treatment (ie, up to 51 days)
measure: Number of Participants With Clinically Significant Laboratory Abnormalities in Hematology, Chemistry, and Urinalysis
timeFrame: From baseline up to Day 4 of Period 4 (approximately 17 days)
measure: Number of Participants With Clinically Significant Change From Baseline in Vital Signs
timeFrame: From baseline up to Day 4 of Period 4 (approximately 16 days)
measure: Number of Participants With Clinically Significant Physical Examination Values
timeFrame: From baseline up to 35 days after last dose of study treatment (ie, up to 51 days)
measure: Number of Participants With Clinically Significant Abnormal 12-Lead Electrocardiogram (ECG)
timeFrame: From baseline up to Day 4 of Period 4 (approximately 16 days)
Other outcomes:
Locations:
city: New Haven
country: United States
facility: New Haven Clinical Research Unit
state: Connecticut
Study officials:
affiliation: Pfizer
name: Pfizer CT.gov Call Center
role: STUDY_DIRECTOR
References: