"Bromhexine", DrBeen Medical Lectures YouTube channel (28 July 2020)
I've taken some interest in this one. Bromhexine is a "mucolytic drug used in treating respiratory disorders associated with viscid [sticky] or excessive mucus" that's available "over-the-counter" in many countries (although not, apparently, in the US). It seems that the drug has been gaining some attention because it may help to block an enzyme (TRMPSS2) that's key to priming the SARS-CoV-2 "S protein" by which the virus can gain entry into our cells. Although there is little clinical evidence yet of its effectiveness, there is a theoretical basis for the suggestion. Please see the links on the video page for more information.
(Again, please be aware that I am NOT a medical doctor. I have no training in medicine whatsoever. Please do not take this posting as medical advice in any way. Please DO NOT take any medications without supervision by a medical doctor. I am simply sharing with you something of interest.)