Evaluating the effects of antihistamines and amantadine on COVID-19 outcomes

Evaluation of Treatments With Antihistamines and Amantadine in the Evolution of the SARS-CoV-2 Infection

Observational Consorci Sanitari de Terrassa · NCT05504057

This study is testing whether taking antihistamines or amantadine helps older patients in nursing homes have better outcomes with COVID-19 compared to those who don't take these medications.

Quick facts

Study typeObservational
Enrollment140660 (estimated)
SexAll
SponsorConsorci Sanitari de Terrassa Academic / other
Locations2 sites (Terrassa, Barcelona and 1 other locations)
Trial IDNCT05504057 on ClinicalTrials.gov

What this trial studies

This observational study aims to quantify the rates of symptomatic COVID-19 infection, hospital admissions, and survival among patients who are chronically treated with antihistamines or amantadine. The research will analyze data from patients in nursing homes and compare their outcomes with a control group from the Terrassa Health Consortium. By stratifying results by age groups, the study seeks to determine the potential protective roles of these medications in the evolution of COVID-19.

Who should consider this trial

Good fit: Ideal candidates for this study are patients who are on chronic treatment with antihistamines or amantadine.

Not a fit: Patients not receiving chronic treatment with antihistamines or amantadine may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could identify effective treatments that improve outcomes for COVID-19 patients.

How similar studies have performed: Previous reports have suggested potential benefits of antihistamines and amantadine in COVID-19 cases, indicating that this approach may have merit.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria: Patients having chronic treatment with antihistamines or amantadine -

Exclusion Criteria: None

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Where this trial is running

Terrassa, Barcelona and 1 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions COVID-19antihistaminesamantadinehospital admissionssurvival
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.