Building on these findings, we further analyzed the AQVN/EIIP domain of histamine H1 receptor antagonists from the ChEMBL database (https://www.ebi.ac.uk/chembl/explore/target/CHEMBL231 accessed on 30 March 2025) to identify additional candidates for repurposing these drugs against influenza. Here, HRH1 is linked to influenza.