https://www.medpagetoday.com/infectiousdisease/covid19/88119
Famotidine is a histamine-2 receptor antagonist. The authors noted the mechanism by which famotidine might improve COVID-19 outcomes is currently unknown, but hypothesized it might work via “inverse-agonism” of the histamine-2 receptor, which implies SARS-CoV-2 is “at least partially mediated by pathological histamine release,” the authors said.
Thanks.