There are three main risks. Firstly, as far as the authorities are concerned the drug is of unproven benefit so that means that Ivermectin is not registered for use against COVID-19. As Ivermectin is now registered for human use, albeit as a dermatological preparation, the active ingredient may now be administered to humans, but only after compounding thereof in line with the law.
Secondly, you would be prescribing it for an indication it is not registered for, and as such, your prescription would be off-label.
Thirdly, with the possible exception of manufactured human Ivermectin having been legally imported for compassionate use, no manufactured Ivermectin is lawfully available for human consumption in South Africa. Under the circumstances orally available Ivermectin has to be made up; known as compounding.
So currently there are three risks – the unproven benefit of the medication, the fact that it is prescribed off-label and the medication available for oral consumption is compounded.