Beyond some awkward silence I can't imagine it will change much. The side effects of ivermectin don't sound particularly nice [0]: - anaemia - coma - confusion - conjunctival haemorrhage - difficulty standing - difficulty walking - encephalopathy - faecal incontinence
although if it was you're only chance of survival the side effects might not matter, but with the new COVID drugs that, at least in developed countries, is no longer the case.
Is there are any issues with mass use of ivermectin, something akin to antibiotic resistance?
[0] https://bnf.nice.org.uk/drug/ivermectin.html#sideEffects