She had wanted to do the $200 test to see if it WAS FHV, which is fine by me, but in the meantime, I thought I'd go ahead with the L-Lysine. She said that was fine, and to give him 250mg a day.
Meanwhile, I've been adding 500mg to his water (which maybe he doesn't drink the whole thing every day, but I'd say at least 2/3 of it), and 500mg to his wet food (which again, he's probably not getting all 500, but I'd say more than 2/3 of that as well). So let's call it 750mg a day he's getting.
The vet left a message, so I didn't get to SPEAK with her to tell her that I've been giving more than that, but is that alright? Not that I'd take strangers' advice over the internet over my vet's advice, but at the same time, we're in a small town in WV where I'm sure most people don't notice if their cat is sneezing a lot, so I'm not sure how many people around here really bring that to the vet's attention. I trust her; she's a good vet. But she probably hasn't dealt with this a lot. And it seems like you guys are VERY well-versed in this.
So, is the 750mg too much? Are there any long-term effects of being on TOO MUCH L-Lysine? For the record, he seems to be doing just fine...still some sneezing, but no congestion, and his breathing seems pretty good, actually.