Ivermectin, an anti-parasitic, was one of many drugs medical professionals reviewed for repurposing early on in the COVID-19 pandemic. Some doctors who gave ivermectin to infected patients saw seemingly positive effects. However, more studies show it has little to no effect when it comes to treating COVID-19. In recent weeks, there has been a dramatic increase in calls to poison centers by people who are taking ivermectin intended for animals. Meanwhile, emergency rooms are seeing more patients who have overdosed a version of the medicine intended as a horse dewormer. The drug has stayed in the headlines following Joe Rogan...