This whole narrative is ragebait. According to the article, the number of calls went up from 133 to 459. In percentage terms, that's an enormous jump, but it absolute terms, it's still basically nothing. There are 55 poison control centers in the country, so this works out to 8 or 9 cases per center.

The only reason this is a story at all is because NPR and its allies want to sustain the narrative that there are an enormous number of people attempting to self-medicate with ivermectin, and therefore that we need to further clamp down on free speach and ostracise and punish anyone who isn't going along with the mainstream narrative. Like most "news" these days, it's blatantly propagandistic in its content and intent.