# A Study to Learn About the Medicine (PF-07321332 or Nirmatrelvir/Ritonavir) in Healthy Lactating Women

> **NCT05441215** · PHASE1 · COMPLETED · sponsor: **Pfizer** · enrollment: 8 (actual)

## Conditions studied

- Healthy Participants

## Interventions

- **DRUG:** nirmatrelvir
- **DRUG:** ritonavir

## Key facts

- **NCT ID:** NCT05441215
- **Lead sponsor:** Pfizer
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2022-12-12
- **Primary completion:** 2023-12-15
- **Final completion:** 2023-12-15
- **Target enrollment:** 8 (ACTUAL)
- **Last updated:** 2026-05-01


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05441215

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05441215, "A Study to Learn About the Medicine (PF-07321332 or Nirmatrelvir/Ritonavir) in Healthy Lactating Women". Retrieved via AI Analytics 2026-07-01 from https://api.ai-analytics.org/clinical/NCT05441215. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*