Dozens of studies provided evidence that both, Ivermectin and Hydroxychloroquine, were effective against COVID. The reason they were attacked was because effective medication would have prevented the emergency authorization for the "vaccines":
https://www.realclearpolitics.com/video/2024/05/08/chris_cuomo_i_am_taking_a_regular_dose_of_ivermectin_we_were_given_bad_information_early_on_in_covid.html