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?:abstract
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OBJECTIVE: Reports that the over-the-counter histamine H(2) receptor antagonist famotidine could help treat the novel coronavirus disease (COVID-19) appeared from April 2020. We, therefore, examined reports on interactions between severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and histamine receptor antagonists. METHODS: A systematic literature search was performed by 19 September 2020, and updated on 28 October 2020, in PubMed, Scopus, Cochrane Library and Google Scholar using (COVID-19 OR coronavirus OR SARS-CoV-2) AND (histamine antagonist OR famotidine OR cimetidine). ClinicalTrials.gov was searched for COVID-19 and (famotidine or histamine). RESULTS: Famotidine may be a useful addition in COVID-19 treatment, but the results from prospective randomized trials are as yet awaited. Bioinformatics/drug repurposing studies indicated that, among several medicines, H(1) and H(2) receptor antagonists may interact with key viral enzymes. However, in vitro studies have to date failed to show a direct inhibition of famotidine on SARS-CoV-2 replication. CONCLUSIONS: Clinical research into the potential benefits of H(2) receptor antagonists in managing COVID-19 inflammation began from a simple observation and now is being tested in multi-centre clinical trials. The positive effects of famotidine may be due to H(2) receptor-mediated immunomodulatory actions on mast cell histamine–cytokine cross-talk, rather than a direct action on SARS-CoV-2.
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?:doi
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?:doi
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10.1007/s00011-020-01422-1
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document_parses/pdf_json/0d7df37d981894272c4af7c0eba488e4adb757bc.json
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document_parses/pmc_json/PMC7673069.xml.json
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Histamine receptors and COVID-19
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