Make sure you are aware of the effects of medication and the right use cases.
https://www.webmd.com/drugs/2/drug-1122/ivermectin-oral/details
Many people with critical illnesses feel a sense of desperation as the doctors do not seem to have answers and science has not yet found a good cure for them. It is absolutely natural that upon this situation, anyone will try seek any and all alternatives - even unscientific, unproven or simply fraudulent. Please, be aware that there are people out there going after your money and they are going to take advantage of your situation in your most desperate moments.
This society is full of this type of parasites, so do not fall from them.