An international team of scientists reported last week  they had happened upon a surprising finding: A common active ingredient in dozens of over-the-counter cough syrups , capsules and lozenges appeared to boost replication of the SARS-Co-V-2 virus when tested under laboratory conditions. Dextromethorphan is a key ingredient of virtually all over-the-counter cough and cold formulations, including those sold as Robitussin, Benylyn, DayQuil/NyQuil, Delsym, Triaminic and Theraflu. The findings were reported in the journal Nature.  (challenger photo)