No, not griseofulvin. I've read about that one and talked to our vet about it. Personally, I'd be worried about using that one. If there were no alternatives, and the infection wouldn't clear, of course, I'd consider it. However, we feel we have found an alternative, safe medication that has worked.
LR is on The Program (Lufenuron). It is not made for GP's--nothing is, though. It's used it in cats. It does absolutely nothing to mammals or any of their cells. So it's safe, safe, safe
(we believe, anyway). The Program prevents chitin formation. Mammals don't have chitins. Fleas and Funguses do; the chitin is an integral part of their cells.
The Program has been the only thing that has ever completely cleared up LR. Yes, we use Miconozole topical on the affected area, and we also bathe him with Chlorhexiderm to reduce the fungal population. But The Program is what has always made the fungus go away. The thing is, that about a month after we stop using it, LR gets a fungal infection again. He seems to have a reduced immunity to what the other pigs, and most humans, can handle.
So as soon as LR is all clear from his current outbreak, we will give him a monthly dose of The Program--most likely for the rest of his life. And I hope that means much less frequent baths for him--even though it makes for such cute photographs