Clinical trials: Ritonavir
Healthy Participants
A Study to Learn About the Medicine (PF-07321332 or Nirmatrelvir/Ritonavir) in Healthy Lactating Women
The main purpose of this study is to measure the level of active ingredient of the study medicine (nirmatrelvir) that is secreted in human breast milk when it is given to healthy breastfeeding women.
- Trial name
- NCT05441215
- Testing
- nirmatrelvir, ritonavir
- Where
- Belgium
- Volunteers
- 8 people, healthy volunteers welcome
- Sponsor
- Pfizer
HIV Infections
Pharmacokinetic Study of Antiretroviral Drugs and Related Drugs During and After Pregnancy
IMPAACT P1026s is a Phase IV prospective clinical study to evaluate the pharmacokinetics (PKs) of antiretroviral (ARV) and tuberculosis (TB) medications in pregnant women and their infants.
- Trial name
- NCT00042289
- Testing
- atazanavir/cobicistat, darunavir/ritonavir dosage #1, darunavir/ritonavir dosage #2
- Where
- 62 sites in United States, Argentina and 6 more
- Volunteers
- 1,578 people, healthy volunteers welcome
- Sponsor
- National Institute of Allergy and Infectious Diseases (NIAID)
Human Immunodeficiency Virus
Post-Exposure Prophylaxis in Health Care Workers
Objective: The objective of this study is to determine the safety and tolerability of Post-exposure Prophylaxis (PEP) with a regimen of Truvada + Kaletra among health care workers (HCWs) at Henry Ford Hospital.
- Trial name
- PEP (NCT01234116)
- Testing
- emtricitabine/tenofovir disoproxil fumarate
- Where
- United States
- Volunteers
- 16 people, healthy volunteers welcome
- Sponsor
- Henry Ford Health System
HIV
Safety and Acceptability Study of Non-occupational Prophylaxis (PEP) Following Potential Exposure to HIV
This study will evaluate how safe and tolerable a combination of taking three-drugs will be for the purpose of preventing HIV transmission after a high-risk sexual contact exposure in HIV uninfected adults.
- Trial name
- NCT01602822
- Testing
- Tenofovir DF and Emtricitabine; Ritonavir-boosted Atazanavir
- Where
- United States
- Volunteers
- 11 people, healthy volunteers welcome
- Sponsor
- Kenneth H. Mayer, MD
Bioavailability
Relative Bioavailability Study of 4 Different Formulations of PF-07321332 Relative to the Commercial Tablet Formulation
The purpose of this study is to estimate the relative bioavailability of PF-07321332 in different formulations in healthy adult participants.
- Trial name
- NCT05263895
- Testing
- PF-07321332/ritonavir, PF-07321332
- Where
- United States
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Pfizer
Pharmacokinetics, Healthy Volunteers
A Study to Learn About the Study Medicine Called Nirmatrelvir/Ritonavir in People Who Are Healthy Volunteers Co-administered the Medicine Rosuvastatin
The purpose of this study is to learn about the effect of the study medicine (called nirmatrelvir/ritonavir) on the pharmacokinetics of the medicine rosuvastatin in healthy volunteers.
- Trial name
- NCT05898672
- Testing
- Rosuvastatin, Nirmatrelvir/ritonavir
- Where
- Belgium
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Pfizer
Healthy Participants
A Study to Learn About the Study Medicine PF-07321332 and Ritonavir in Adult Healthy Chinese Participants.
The purpose of this Phase 1 clinical trial is to help us understand how the drug is changed and eliminated from your body after you take it, the safety, and the the extent to which dise effects can be tolerated of PF-07321332…
- Trial name
- NCT05339334
- Testing
- PF-07321332/ritonavir
- Where
- China
- Volunteers
- 14 people, healthy volunteers welcome
- Sponsor
- Pfizer
Biological Availability, Healthy Participants
Relative Bioavailability Study of Nirmatrelvir/Ritonavir 4 Different Fixed Dose Combination Tablets Relative to the Commercial Tablets in Healthy Participants
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…
- Trial name
- NCT05525910
- Testing
- Nirmatrelvir/ ritonavir, Nirmatrelvir/ritonavir
- Where
- United States
- Volunteers
- 15 people, healthy volunteers welcome
- Sponsor
- Pfizer
HIV Infections
Drug-drug Interaction (DDI) Study of GSK3640254 With Darunavir/Ritonavir (DRV/RTV) and Etravirine (ETR)
This is an open-label, single-sequence, multiple-dose, 3 cohort study to investigate the effects of DRV/RTV and/or ETR on the pharmacokinetics (PK) of GSK3640254 and the effects of GSK3640254 on the PK of DRV/RTV and/or ETR.
- Trial name
- NCT04630002
- Testing
- GSK3640254, Darunavir/Ritonavir (DRV/RTV), Etravirine (ETR)
- Where
- United States
- Volunteers
- 54 people, healthy volunteers welcome
- Sponsor
- ViiV Healthcare
Bioavailability
Relative Bioavailability Study of PF-07321332/Ritonavir Oral Powder Relative to the Commercial Tablets in Healthy Participants
The purpose of this study is to estimate the relative bioavailability of PF-07321332/ritonavir oral powder relative to the commercial tablet formulation under fasted condition in healthy adult participants.
- Trial name
- NCT05263921
- Testing
- PF-07321332/ritonavir
- Where
- United States
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Pfizer
Biological Availability
Relative Bioavailability Study of Nirmatrelvir/Ritonavir Oral Powder Relative to the Commercial Tablets and Estimation of the Effect of Food on Bioavailability of the Nirmatrelvir/Ritonavir Oral Powder in Healthy Participants.
The purpose of this study is to estimate the relative bioavailability (rBA) of nirmatrelvir/ritonavir oral powder in 3 different food vehicles relative to the Paxlovid® tablets under fasted condition in healthy adult…
- Trial name
- NCT05544786
- Testing
- Nirmatrelvir/ ritonavir, Nirmatrelvir/Ritonavir
- Where
- Belgium
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Pfizer
Healthy Participants
PF-07321332/Ritonavir and Ritonavir on Dabigatran Study in Healthy Participants
This is a drug-drug interaction study to assess the effects of PF-07321332/ritonavir and ritonavir on the Pharmacokinetic (PK) of dabigatran in healthy volunteers. PK will be evaluated for PF-07321332 and ritonavir.
- Trial name
- NCT05064800
- Testing
- Dabigatran, PF-07321332/ritonavir + Dabigatran, Ritonavir + Dabigatran
- Where
- United States
- Volunteers
- 24 people, healthy volunteers welcome
- Sponsor
- Pfizer
Healthy Participant
Drug-Drug Interaction Study Assessing Effect of Carbamazepine on PF-07321332 Boosted With Ritonavir
This is a drug-drug interaction study to assess the effects of a single dose of PF-07321332/ritonavir after multiple dose administrations of carbamazepine. Pharmacokinetic (PK) will be evaluated for PF-07321332 and ritonavir.
- Trial name
- NCT04962230
- Testing
- PF-07321332/ritonavir, Carbamazepine, PF 07321332/ritonavir
- Where
- United States
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Pfizer
Healthy Participants
Food Effect Study to Evaluate the Effect of High-Fat Meal on the Relative Bioavailability of PF-07321332 Boosted With Ritonavir in Healthy Adult Participants
This is a Phase 1, open label, single dose, randomized, 2-treatment, 2-sequence, 2-period crossover study to evaluate the effect of high-fat meal on the relative bioavailability of PF-07321332 boosted with ritonavir following…
- Trial name
- NCT05129475
- Testing
- PF-07321332/ritonavir, Ritonavir
- Where
- United States
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Pfizer
Healthy Participants
Drug-Drug Interaction Study to Estimate the Effect of PF-07321332/Ritonavir and Ritonavir on Midazolam in Healthy Participants
The purpose of this study is to estimate the effect PF-07321332/Ritonavir and Ritonavir on Midazolam (a cytochrome P450 [CYP]3A4 substrate) in Healthy Adult Participants.
- Trial name
- NCT05032950
- Testing
- Midazolam, PF-07321332/ritonavir + Midazolam, Ritonavir + Midazolam
- Where
- Belgium
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Pfizer
Hepatic Impairment
Study to Estimate the Effects of Hepatic Impairment on the Pharmacokinetics (PK) of PF-07321332
The study is to estimate the effect of hepatic impairment on the plasma PK of PF-07321332/ritonavir. Findings from this study will be used to develop dosing recommendations so that the dose and/or dosing interval may be adjusted…
- Trial name
- NCT05005312
- Testing
- PF-07321332, Ritonavir
- Where
- 2 sites in United States
- Volunteers
- 17 people, healthy volunteers welcome
- Sponsor
- Pfizer
Renal Impairment
Renal Impairment Study of PF-07321332 Boosted With Ritonavir in Adult Participants With Renal Impairment and in Healthy Participants With Normal Renal Function.
This is a Phase 1, non-randomized, open-label, 2-part study to investigate the effect of renal impairment on the pharmacokinetics (PK), safety and tolerability of a single oral dose of PF-07321332 in combination with the PK…
- Trial name
- NCT04909853
- Testing
- PF-07321332/ritonavir
- Where
- 5 sites in United States
- Volunteers
- 35 people, healthy volunteers welcome
- Sponsor
- Pfizer
Healthy Participant
Drug-Drug Interaction Study Assessing Effect of Itraconazole on PF-07321332/Ritonavir in Healthy Participants
The purpose of this study is to estimate the effect of a strong inhibitor of CYP3A4 (itraconazole) on the pharmacokinetics (PK) of PF-07321332/ritonavir in healthy participants.
- Trial name
- NCT04962022
- Testing
- PF-07321332/ritonavir, Itraconazole
- Where
- Belgium
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Pfizer
Malaria
Pyronaridine Artesunate-Ritonavir Drug-drug Interaction Study
The primary objective of the study is to determine any drug interaction between the antimalarial Pyramax (pyronaridine artesunate) and the protease inhibitor ritonavir in healthy subjects.
- Trial name
- NCT01156389
- Testing
- Ritonavir and Pyramax, Pyramax
- Where
- Switzerland
- Volunteers
- 34 people, healthy volunteers welcome
- Sponsor
- Medicines for Malaria Venture
COVID-19, SARS-CoV-2
Treatment for COVID-19 in High-Risk Adult Outpatients
This is a randomized trial for the treatment of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in high-risk adults not requiring hospital admission.The overarching goal of this study is to assess the…
- Trial name
- NCT04354428
- Testing
- Ascorbic Acid, Hydroxychloroquine Sulfate, Azithromycin
- Where
- 6 sites in United States
- Volunteers
- 289 people, healthy volunteers welcome
- Sponsor
- University of Washington