Actually Ivermectin has been studied for use on viruses for years and generally found effective. Most recently it was identified as successful treatment for Den

Actually Ivermectin has been studied for use on viruses for years and generally found effective. Most recently it was identified as successful treatment for Dengue Fever. https://www.ncbi.nlm.nih.gov/pubmed/30452439 https://www.ncbi.nlm.nih.gov/pubmed/30452439 I suspect it isn't touted as a cure for the common cold because the common cold is rarely severe enough to merit prescription drugs. This blurb from drugs.com gives a very high-level overview of how it theoretically works: To get into the nucleus the viral proteins need to bind a cargo transporter which lets them in. Ivermectin can block the cargo transporter, so the viral proteins can’t get into the nucleus. This is how the scientists believe Ivermectin works against SARS-CoV-2 virus.