Famotidine (Pepcid) proves itself in clinical trial to be helpful against COVID-19

https://www.medrxiv.org/content/10.1101/2020.05.01.20086694v1

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A research study by Columbia University, Northwell Health and Massachusetts General Hospital shows that Famotidine, a common heartburn drug improved the clinical outcomes of hospitalized COVID-19 patients.

The study involving 1620 patients from more than 10 hospitals in the United States showed that Famotidine associated with reduced risk of intubation or death in hospitalized COVID-19 patients. However further randomized controlled trials are warranted and also detailed studies are needed to understand the mode of its efficacy.
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