- ICH GCP
- US Clinical Trials Registry
- Clinical Trial 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
The purpose of this study is to compare whether being treated with Paxlovid (nirmatrelvir plus ritonavir) for 15 days works better than being treated with placebo (plus ritonavir) to reduce severe symptoms of Long Covid (the placebo does not have any active drug).
Participants will have 5 planned visits to the study clinic over 15 weeks and will take the drug (or placebo) for the first 15 days.
This study uses the term post-acute sequelae of SARS-CoV-2 (PASC), which is another name for "Long Covid."
Study Overview
Status
Intervention / Treatment
Detailed Description
Study Type
Enrollment (Actual)
Phase
- Phase 2
Contacts and Locations
Study Locations
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California
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Stanford, California, United States, 94305
- Stanford University
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-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Normal or near-normal kidney function
- History of confirmed COVID-19 infection that preceded the post-COVID symptoms
- Post-COVID-19 symptoms persisting greater than three months
- At least 2 post-COVID symptoms of moderate or severe intensity (fatigue, brain fog, shortness of breath, body aches, gastrointestinal symptoms, or cardiovascular symptoms)
- Willing to report all vaccinations
- Women of childbearing potential or men whose partners may become pregnant must use acceptable method of contraception during the treatment period and for 28 days after the last dose of the study drug
- Willing and able to adhere to study procedures and available for the duration of the study
Exclusion Criteria:
- Suspected or confirmed pregnancy or breastfeeding
- Severe liver disease
- Prior use of study drug or other COVID treatment within 30 days
- Hypersensitivity or other contraindication to any components of the study drug
- Current or expected use of any medication dependent on or inducer of CYP3A4
- Current or expected use of supplements or herbs (unless medically necessary) that cannot be temporarily held (period as determined necessary by investigators)
- HIV infection with viral load >50 copies/ml
- Suspected or confirmed active COVID infection within 30 days
- History of COVID vaccine within 28 days prior to enrollment, or other vaccine (influenza, shingles, etc.) within 14 days of enrollment, or planned use of any vaccine until the primary endpoint has been met (10 weeks)
- Other medical condition(s) or concomitant therapy that would compromise participant's safety or compliance with the study protocol or significantly confound interpretation of study results, as determined by study investigators
- Current enrollment in, or discontinuation within the last 30 days from, a clinical trial involving any investigational drug or device
- Inability to provide informed consent
- Currently hospitalized
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Nirmatrelvir plus ritonavir
Participants receive nirmatrelvir plus ritonavir (Paxlovid) for 15 days, and attend follow-up visits through week 15.
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Two 150 mg tablets taken by mouth every 12 hours
One 100 mg capsule taken by mouth every 12 hours
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Placebo Comparator: Placebo plus ritonavir
Participants receive placebo to match nirmatrelvir plus ritonavir for 15 days, and attend follow-up visits through week 15.
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One 100 mg capsule taken by mouth every 12 hours
Two tablets containing placebo matching nirmatrelvir taken by mouth every 12 hours
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Core Symptoms Severity Scale Score
Time Frame: Week 10
|
This measure will evaluate whether there is a difference between treatment with Paxlovid versus placebo on any of the 6 core symptoms of PASC at week 10 (adjusting for patients' baseline levels).
Each symptom (fatigue, brain fog, dyspnea, body aches, gastrointestinal symptoms, cardiovascular symptoms) is assessed on a 4-point Likert scale (range: 0 to 3; 0 = no symptoms; 1 = mild symptoms; 2 = moderate symptoms; 3 = severe symptoms).
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Week 10
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Core Symptoms Severity Scale Score
Time Frame: Day 15
|
This measure will evaluate whether there is a difference between treatment with Paxlovid versus placebo on any of the 6 core symptoms of PASC at day 15 (adjusting for patients' baseline levels).
Each symptom (fatigue, brain fog, dyspnea, body aches, gastrointestinal symptoms, cardiovascular symptoms) is assessed on a 4-point Likert scale (range: 0 to 3; 0 = no symptoms; 1 = mild symptoms; 2 = moderate symptoms; 3 = severe symptoms).
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Day 15
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Number of participants reporting relief of at least one core symptom for 2 weeks
Time Frame: Baseline through week 10, assessed at week 10
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Relief defined as reduction of severity from moderate to none, or severe to mild/none (≥ 2-point Likert score change).
Likert score range: 0 to 3; 0 = no symptoms; 1 = mild symptoms; 2 = moderate symptoms; 3 = severe symptoms.
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Baseline through week 10, assessed at week 10
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Number of participants with overall alleviation for 2 weeks
Time Frame: Baseline through week 10, assessed at week 10
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Overall alleviation defined as both:
Likert score range: 0 to 3; 0 = no symptoms; 1 = mild symptoms; 2 = moderate symptoms; 3 = severe symptoms. |
Baseline through week 10, assessed at week 10
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Severity of the most bothersome symptom
Time Frame: Assessed at weeks 5, 10, and 15
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Severity assessed on a 4-point Likert scale (range: 0 to 3; 0 = no symptoms; 1 = mild symptoms; 2 = moderate symptoms; 3 = severe symptoms).
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Assessed at weeks 5, 10, and 15
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Time to relief of the 6 core symptoms
Time Frame: Up to 15 weeks
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Relief defined as reduction of severity from moderate to none, or severe to mild/none (≥ 2-point Likert score change).
Likert score range: 0 to 3; 0 = no symptoms; 1 = mild symptoms; 2 = moderate symptoms; 3 = severe symptoms.
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Up to 15 weeks
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Change in PROMIS Physical Function Score
Time Frame: Baseline and week 10
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The PROMIS-Physical Function Short Form assesses difficulty level performing activities of daily living such as doing chores, climbing stairs, walking, and running errands.
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Baseline and week 10
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Change in PROMIS Fatigue Score
Time Frame: Baseline and week 10
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The PROMIS Fatigue Score assesses level of fatigue and its interference on daily activities.
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Baseline and week 10
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Change in PROMIS Dyspnea-Severity Score
Time Frame: Baseline and week 10
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The PROMIS-Fatigue Dyspnea-Severity Short Form assesses shortness of breath and its interference on daily activities.
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Baseline and week 10
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Change in PROMIS Cognitive Function Abilities Score
Time Frame: Baseline and week 10
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The PROMIS-Cognitive Function Abilities Short Form assesses brain fog and its interference on daily activities.
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Baseline and week 10
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Change in orthostatic vitals test
Time Frame: Baseline and week 10
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This outcome measures the difference in seated versus standing blood pressure.
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Baseline and week 10
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Change in 1-minute sit-to-stand test
Time Frame: Baseline and week 10
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Number of times participant is able to go from sitting (in an armless chair) to standing in 1 minute.
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Baseline and week 10
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Patient Global Impression of Severity (PGIS) scale score
Time Frame: Weeks 5, 10, and 15
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Change in health status rated from 1 to 6. 1 = not present; 2 = very mild; 3 = mild; 4 = moderate; 5 = severe; 6 = extremely severe.
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Weeks 5, 10, and 15
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Patient Global Impression of Change (PGIC) scale score
Time Frame: Baseline and weeks 5, 10, and 15
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Change in health status rated from 1 to 7. 1 = very much improved; 2 = much improved; 3 = minimally improved; 4 = no change; 5 = minimally worse; 6 = much worse; 7 = very much worse.
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Baseline and weeks 5, 10, and 15
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Collaborators and Investigators
Sponsor
Collaborators
Investigators
- Principal Investigator: Upinder Singh, MD, Stanford University
- Principal Investigator: Linda Geng, MD, PhD, Stanford University
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Estimated)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Pathologic Processes
- Coronavirus Infections
- Coronaviridae Infections
- Nidovirales Infections
- RNA Virus Infections
- Virus Diseases
- Infections
- Respiratory Tract Infections
- Respiratory Tract Diseases
- Pneumonia, Viral
- Pneumonia
- Lung Diseases
- Disease Attributes
- Chronic Disease
- Post-Infectious Disorders
- COVID-19
- Post-Acute COVID-19 Syndrome
- Molecular Mechanisms of Pharmacological Action
- Anti-Infective Agents
- Antiviral Agents
- Enzyme Inhibitors
- Anti-HIV Agents
- Anti-Retroviral Agents
- Protease Inhibitors
- Cytochrome P-450 CYP3A Inhibitors
- Cytochrome P-450 Enzyme Inhibitors
- HIV Protease Inhibitors
- Viral Protease Inhibitors
- Ritonavir
- Nirmatrelvir
Other Study ID Numbers
- 66994
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
IPD Plan Description
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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