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NCT07597902RecruitingPhase 2

SARS-CoV-2 and Herpesvirus Inhibition for Ending Long COVID Dysfunction

SARS-CoV-2 and Herpesvirus Inhibition for Ending Long COVID Dysfunction (SHIELD)

Source: ClinicalTrials.gov · Last updated 28 Oct 2026

Brief summary (registry, in English)

The purpose of this research study is to test if the combination of three drugs, valacyclovir, celecoxib, and Paxlovid will decrease the symptoms of Long COVID in adults compared to a placebo (this does not contain the medications).

Status (registry)
Recruiting
Phase (registry)
Phase 2
Study type
Interventional
Enrollment
150 (estimated)
First submitted
14 May 2026
Start date
20 Oct 2026
Primary completion date
30 Jun 2028
Lead sponsor
Icahn School of Medicine at Mount Sinai
NCT number
NCT07597902

What you commit to

  • Study type: Interventional · Phase 2
  • Planned participants: 150
  • From 20 Oct 2026 to the primary completion date, 30 Jun 2028
  • 1 site in 1 country
  • Visits and tests: ask the trial team, the registry does not list them

Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.

Who cannot take part

Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.

Prior treatment

  • Currently meeting criteria for ME/CFS at the pre-screening or screening visit, or a prior confirmed diagnosis of ME/CFS within the last 5 years. This may be determined as part of the initial screening call or visit.
  • Any anticipated need for surgery that in the opinion of the Principal Investigator or Sub-I might confound results or interfere with the participant's ability to comply with the protocol.
  • Acute non-COVID systemic infection (e.g., HIV, hepatitis) or other active viral or bacterial infection during the screening/washout period or at the Baseline visit.
  • Currently receiving chronic systemic corticosteroids (\>5 mg prednisone daily, or equivalent)
  • Routine treatment with warfarin, heparin, lithium, digoxin, amiodarone, isoniazid, phenytoin, fluconazole, methotrexate, probenecid, or raloxifene. Participants on these medications should not be screened.
  • Use of chronic nucleoside analog antiviral suppression therapy within one month of the Screening Visit or requiring on average more than one acute treatment course every two months.

Other illness

  • In the opinion of the Investigator, any clinically significant, uncontrolled, or unstable medical or surgical condition that could affect the individual's ability to participate in the study or potentially compromise their well-being while enrolled in the study.
  • In the opinion of the Investigator or based on results of the HADS, evidence of a clinically significant psychiatric disorder, e.g., severe, unstable or poorly controlled depression, anxiety or obsessive-compulsive disorder; moderate or severe alcohol use disorder; substance use disorder other than mild cannabis use disorder; or any history of bipolar disorder, schizophrenia, schizoaffective disorder or other psychotic disorder.
  • Symptomatic and/or otherwise clinically significant cardiac disease
  • In the opinion of the Investigator, evidence of current drug or alcohol abuse or dependency, or history of abuse or dependence during the preceding 12 months.

Other

  • Breastfeeding, pregnant, or planning to become pregnant during the next six months.
  • Uncontrolled sleep apnea.
  • Current use of celecoxib either alone or in combination with valacyclovir or famciclovir
  • The participant has undergone a malabsorptive weight loss procedure (e.g., Roux-en-Y or other bypass procedure).
  • Severe IBS-C or colonic inertia as evidenced by seven or more days between bowel movements.

Who the study is looking for

  • 18-65 years of age at the time of study entry
  • Diagnosed with Long COVID
  • Individuals of child-bearing potential must have a negative serum pregnancy test at screening and agree to on-site urine pregnancy testing at all subsequent study visits
  • A urine drug screen performed at the Screening Visit must be negative for drugs of abuse such as methamphetamine, cocaine, phencyclidine (PCP), and non-disclosed amphetamines and opioids/opiates.
  • Those with mild to moderate depression should be clinically stable for three months, without risk of suicidal ideation or behavior.

Age in the registry: 18 years to 65 years · Sex: All · Does not accept healthy volunteers

Full criteria on ClinicalTrials.gov

Sites (1)

Sites in registry order. Pick your city on the disease page to sort them by distance.

SiteCityCountrySite status
The Cohen Center for Recovery from Complex Chronic Illnesses (CoRE)
Coordinator of this site? Confirm its status
New YorkUnited StatesRecruiting

This page is information, not medical advice. Discuss any trial with your doctor.