Also it turns out what I thought was a nasal discharge was actually some built up shed skin. He started shedding yesterday and the piece is starting to come off on its own; it's only hanging on by a thread of shed skin. This was the best possible outcome, because it might have been a growth or nasal infection, etc.
Ponazuril worked amazingly well for the coccidia. Eliminated the parasites in half the time the vet anticipated.