Dr Danny Donaghy is professor of dairy systems at Massey University and a specialist in pasture agronomy and physiology.
Apparently, health officials in the US have been warning people not to self-dose themselves with Ivermectin drench in an attempt to prevent them from getting Covid-19.
Such is the concern about Americans contemplating using Ivermectin instead of getting a Covid shot, the US federal Food and Drug Aministration (FDA) had a simple message: "You are not a horse," it said. "You are not a cow. Seriously, y'all. Stop it."
As with other purported alternative treatments for Covid-19, misinformation about Ivermectin has spread on social media and politicians.
US surgeon general Dr Vivek Murthy told CNN: "The best protection we have against Covid-19 is the vaccine, and if you get Covid-19, we actually do have treatments that work. Ivermectin is not one of them!"