Also to be noted: these are just calls to the poison centers from worried people, who may have eaten too much or had kids eat what they shouldn't etc. It is not at all indicative of health issues, or serious health issues.

Ivermectin is rather safe across a very wide dose range (apart from some nausea, tremor, eczema etc.), so it's quite unlikely for any serious harm to occur, and as far as I know not a single death has been attributed to Ivermectin overdose in humans.