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A Study to Learn How Paxlovid [Nirmatrelvir-ritonavir/PF-07321332] Works in COVID-19 Patients Who Are Elderly or Have Medical Conditions.
Sponsor: Pfizer
Summary
The purpose of this study is to learn about the effects of the study medicine called Paxlovid \[nirmatrelvir-ritonavir/PF-07321332\], for the potential treatment of COVID-19. This study will use patient health records in Ontario, to find people who were sick with COVID-19 and visited a pharmacist to be treated, anytime from December 1st, 2022, to March 31st, 2024. To be included in our study, the people must be over 18 years of age and be registered in the Ontario health system for at least one year. People were not included in our study if they have been pregnant in the past year or have serious kidney or liver disease. We will separate the people in the study into two groups: those who received treatment with Paxlovid \[nirmatrelvir-ritonavir/PF-07321332\] and those who received no treatment. We will monitor their healthcare visits or if they die for any reason, for up to 60 days after the date that they visited their pharmacist. Then we will compare participant experiences when they are taking the study medicine to when they are not. This will help us determine if the study medicine is effective.
Official title: A Real-world Study on the Effectiveness of Nirmatrelvir-ritonavir in Reducing Severe Outcomes From COVID-19
Key Details
Gender
All
Age Range
18 Years - Any
Study Type
OBSERVATIONAL
Enrollment
99000
Start Date
2025-10-27
Completion Date
2026-03-30
Last Updated
2025-12-04
Healthy Volunteers
No
Conditions
Interventions
nirmatrelvir-ritonavir
Participants who were assessed with Covid prescribed and subsequently dispensed nirmatrelvir-ritonavir during the selection period
No treatment
Participants who were assessed with Covid for nirmatrelvir-ritonavir but either were not prescribed the medication or did not have it dispensed during the selection period
Locations (1)
Pfizer New York
New York, New York, United States