If you’re trying to get meds prescribed, before you are even ill, then, no....it doesn’t work that way...unless you ARE a doc, or related to one, somehow.
Get a grip.
Either go to Mexico, or shop for a new doc, pay the 100% of the visit, and go on your merry way.
What makes you think ANY doc will prescribe this for you, BEFORE you have an illness?
I still don’t understand if he actually has COVID.