Paxlovid tested as a shield against long COVID in 2,000-Person trial
NCT ID NCT05852873
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This phase 3 trial tests whether taking Paxlovid (nirmatrelvir/ritonavir) during acute COVID-19 can prevent long COVID. About 2,000 adults aged 18-64 with a recent positive test and symptoms will receive either Paxlovid or a placebo for 5 days. Researchers will track long COVID symptoms like fatigue, breathing problems, and brain fog at 3 months to see if the drug reduces their occurrence.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Paxlovid (nirmatrelvir/ritonavir)
- What this could lead to
- If it works, this could show that taking Paxlovid early during a COVID-19 infection reduces the risk of developing long COVID.
- What could go wrong
- This is a single study in Norway, and results may not apply to everyone. Long COVID is complex, and a short treatment may not prevent all cases.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
-
Phase 3
Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.
- Participants
-
About 2,000 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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May 2023
- Expected to finish
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Jun 2027
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
-
18 to 64 years
- Sex
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Anyone
- Healthy volunteers
-
Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Symptoms attributable to COVID-19 started within the past 5 days and ongoing * Positive PCR or lateral flow SARS-CoV-2 test. Any positive PCR test or a lateral flow test taken between two days before symptom onset and randomisation qualifies. * Age between 18 and 65 years * Participant is able and willing to provide informed consent * Willingness to take a pregnancy test prior to starting study treatment (Participants of childbearing potential) Exclusion Criteria: * Patients that are not able to comply with all study visits * Patient currently inpatient at hospital * Comorbidity which requires active antiviral treatment as judged by the investigator * Any chronic renal impairment * Any chronic liver disease or liver impairment * Previous randomisation in the PANORAMIC Norway trial * Currently participating in a clinical trial of a therapeutic agent * Currently taking Paxlovid * Known allergy to Paxlovid * Use of concomitant medication contraindicated for the treatment of Paxlovid\* * Pregnant and lactating women * Participants of childbearing potential (participants who are anatomically and physiologically capable of becoming pregnant), or have a partner of childbearing potential, not willing to use highly effective contraceptive until 7 days after completing Paxlovid. \* Concomitant medications that are contraindicated for the treatment of Paxlovid * Medicinal products that are highly dependent on CYP3A for clearance and for which elevated concentrations are associated with serious and/or life-threatening reactions. * Medicinal products that are potent CYP3A inducers where significantly reduced nirmatrelvir/ritonavir plasma concentrations may be associated with the potential for loss of virologic response and possible resistance. Paxlovid cannot be started immediately after discontinuation of such medicinal products due to the delayed offset of the recently discontinued CYP3A inducer. More information is available in the study protocol on medicinal products that are contraindicated with concomitant use of Paxlovid.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
Haukeland University Hospital
Bergen, Vestland, 5021, Norway
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Other studies related to the condition(s) this trial covers.
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