I just got positive test result for cryptosporidium from Parawellness. How do I get Alinia?? Is there a veterinary equivalent? Am I correct that that is the only thing effective against crypto?

Incidentally, I went to Dr. Yu last week and he put me on prazi, pyrantel pamoate, and ivermec. I plan to try calling his office tomorrow, but just in case they don't respond, can Alinia be added to this mix, or does something have to go?