AT1001 for the Treatment of Long COVID

This is a registry record, not a result. A trial being listed, recruiting or completed says nothing by itself about whether the compound works or is safe.

Registry numberNCT05747534
StatusCompleted
PhasePhase 2
SponsorMassachusetts General Hospital
Enrollment107 participants
DesignInterventional, Randomized, Parallel, Masking: Quadruple
ConditionsLong COVID; Long COVID-19; Post Acute COVID-19 Syndrome; Post Acute Sequelae of COVID-19
InterventionsLarazotide Acetate; Placebo
StartMay 31, 2023
Primary completionJun 18, 2026
Study completionJun 18, 2026
Results postedNot yet
Registry last updatedAug 18, 2026

Compounds on this site that cite this trial

What the registry says the trial is about

The primary objective of this study is to evaluate the safety and efficacy of Larazotide (AT1001) versus placebo in children and adults 7 to ≤50 years of age who present with symptoms of Long COVID in the presence of SARS-CoV-2 antigenemia. AT1001 (n=100) or placebo (n=50) will be administered orally four times a day (QID) for 21 days.

Primary outcomes

These are what the trial was designed to measure first. They are registered in advance, which is what makes a later result checkable.

Outcome measureTime frame
Adverse Event Profiling and Time to Symptom Resolution8 weeks

1 secondary outcome also registered. See the registry record for the full list.

Source: ClinicalTrials.gov (U.S. National Library of Medicine). Last checked against the registry on Oct 3, 2026. See the trial changes feed for what has changed recently.