If you listen to the anti-vax crowd, a lot of the push-back is because the vaccines are new, only had emergency-use authorization, no long-term studies, etc.

This pill will fit into most of those objections as well. HCQ, ivermectin, and the like have all been around for a long time and even though their was no clinical efficacy on COVID, the anti-vax crowd was onboard with them because they have been around for so long.