Kentucky Sen. Rand Paul said researchers won't study ivermectin because of their "hatred for Trump." Paul said he was "in the middle" on whether ivermectin should be used and wanted more research done. The FDA and CDC are asking people to avoid the drug, which is used to deworm horses and cows.

The efficacy of a drug being promoted by rightwing figures worldwide for treating Covid-19 is in serious doubt after a major study suggesting the treatment is effective against the virus was withdrawn due to "ethical concerns".

The Editor-in-Chief has retracted this article. Following publication, concerns were raised regarding the methodology and the conclusions of this review article. Postpublication review confirmed that while the review article appropriately describes the mechanism of action of ivermectin, the cited sources do not appear to show that there is clear clinical evidence of the effect of ivermectin for the treatment of SARS-CoV-2.