No, that was the prophylaxis recommendation. I assumed that the pills would be 500mg, Mea Culpa. That seems high to me, however.

This study recommends Two doses of oral ivermectin (300 μg/kg/dose given 72 hours apart) as chemoprophylaxis. https://www.cureus.com/articles/64807-prophylactic-role-of-ivermectin-in-severe-acute-respiratory-syndrome-coronavirus-2-infection-among-healthcare-workers

So, the trick is to work out how much you weigh in kg, Then, multiply that by 300 μg (0.3 mg).