Paxlovid for Treatment of Long Covid (STOP-PASC)

Stanford University

Status and phase

Completed

Phase 2

Conditions

Post-acute Sequelae of SARS-CoV-2 Infection

Long COVID

Treatments

Drug: Placebo

Drug: Ritonavir

Drug: Nirmatrelvir

Study type

Interventional

Funder types

Other

Industry

Identifiers

NCT05576662

66994

Details and patient eligibility

About

The purpose of this study is to compare whether being treated with nirmatrelvir plus ritonavir for 15 days works better than being treated with placebo plus ritonavir to reduce severe symptoms of Long Covid.

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."

Full description

An exploratory sub-study will investigate the correlation of physical activity and biometric parameters from digital wearable devices with the subjective symptom severity and other patient-reported outcomes in the main study. All participants with iPhone 6S Plus or newer will be offered an opportunity to opt-in to this sub-study. An Apple Watch and Bluetooth-enabled blood pressure monitor will be provided to participants and data will be collected for the duration of the main study to track participants' physiological and behavioral trends in the Paxlovid versus placebo groups.

Enrollment

168 patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

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