“A pair of over-the-counter compounds have been found in preliminary tests to inhibit the virus that causes COVID-19, University of Florida Health researchers have found.  The combination includes diphenhydramine, an antihistamine used for allergy symptoms.  When paired with lactoferrin, a protein found in cow and human milk, the compounds were found to hinder the SARS-CoV-2 virus during tests in monkey cells and human lung cells.”

https://scitechdaily.com/two-common-over-the-counter-compounds-reduce-covid-19-virus-replication-by-99-in-early-testing/