# A Study to Learn How Paxlovid [Nirmatrelvir-ritonavir/PF-07321332] Works in COVID-19 Patients Who Are Elderly or Have Medical Conditions.

> **NCT07261085** · — · ACTIVE_NOT_RECRUITING · sponsor: **Pfizer** · enrollment: 99000 (actual)

## Conditions studied

- COVID-19

## Interventions

- **DRUG:** nirmatrelvir-ritonavir
- **OTHER:** No treatment

## Key facts

- **NCT ID:** NCT07261085
- **Lead sponsor:** Pfizer
- **Sponsor class:** INDUSTRY
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** ACTIVE_NOT_RECRUITING
- **Start date:** 2025-10-27
- **Primary completion:** 2026-03-30
- **Final completion:** 2026-03-30
- **Target enrollment:** 99000 (ACTUAL)
- **Last updated:** 2025-12-04


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT07261085

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT07261085, "A Study to Learn How Paxlovid [Nirmatrelvir-ritonavir/PF-07321332] Works in COVID-19 Patients Who Are Elderly or Have Medical Conditions.". Retrieved via AI Analytics 2026-05-27 from https://api.ai-analytics.org/clinical/NCT07261085. Licensed CC0.

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