deltatrials
Completed PHASE2 INTERVENTIONAL 2-arm NCT05576662

Paxlovid for Treatment of Long Covid (STOP-PASC)

Selective Trial Of Paxlovid for PASC (STOP-PASC): Randomized Double-Blind Placebo-Controlled Pilot Trial of Paxlovid for the Treatment of PASC

Sponsor: Pfizer

Updated 11 times since 2022 Last updated: Aug 15, 2025 Started: Nov 8, 2022 Primary completion: Aug 14, 2023 Completion: Sep 12, 2023
This information is for research purposes only and is not medical advice. Consult a healthcare provider before making any medical decision.

A PHASE2 clinical study on Long COVID and Post-acute Sequelae of SARS-CoV-2 Infection, this trial is completed. The trial is conducted by Pfizer and has accumulated 11 data snapshots since 2022. Infectious disease trials contribute critical data for public health response and treatment development.

Status Flow

~Nov 2022 – ~Dec 2022 · 30 days · monthly snapshotNot Yet Recruiting~Dec 2022 – ~Jan 2023 · 31 days · monthly snapshotRecruiting~Jan 2023 – ~Jun 2023 · 5 months · monthly snapshotRecruiting~Jun 2023 – ~Aug 2023 · 2 months · monthly snapshotRecruiting~Aug 2023 – ~Sep 2023 · 31 days · monthly snapshotActive Not Recruiting~Sep 2023 – ~Nov 2023 · 2 months · monthly snapshotActive Not Recruiting~Nov 2023 – ~Jul 2024 · 8 months · monthly snapshotCompleted~Jul 2024 – ~Sep 2024 · 2 months · monthly snapshotCompleted~Sep 2024 – ~Oct 2024 · 30 days · monthly snapshotCompleted~Oct 2024 – ~Oct 2025 · 12 months · monthly snapshotCompleted~Oct 2025 – present · 11 months · monthly snapshotCompleted

Change History

11 versions recorded
  1. Oct 2025 — Present [monthly]

    Completed PHASE2

  2. Oct 2024 — Oct 2025 [monthly]

    Completed PHASE2

  3. Sep 2024 — Oct 2024 [monthly]

    Completed PHASE2

  4. Jul 2024 — Sep 2024 [monthly]

    Completed PHASE2

  5. Nov 2023 — Jul 2024 [monthly]

    Completed PHASE2

    Status: Active Not RecruitingCompleted

Show 6 earlier versions
  1. Sep 2023 — Nov 2023 [monthly]

    Active Not Recruiting PHASE2

  2. Aug 2023 — Sep 2023 [monthly]

    Active Not Recruiting PHASE2

    Status: RecruitingActive Not Recruiting

  3. Jun 2023 — Aug 2023 [monthly]

    Recruiting PHASE2

  4. Jan 2023 — Jun 2023 [monthly]

    Recruiting PHASE2

  5. Dec 2022 — Jan 2023 [monthly]

    Recruiting PHASE2

    Status: Not Yet RecruitingRecruiting

  6. Nov 2022 — Dec 2022 [monthly]

    Not Yet Recruiting PHASE2

    First recorded

Eligibility Summary

No eligibility information available.

Contact Information

Sponsor contact:
  • Pfizer
  • Stanford University
Data source: Stanford University

For direct contact, visit the study record on ClinicalTrials.gov .

Study Locations