My entire fur posse just got over a URI and a couple were on chlorpheniramine and the rest were on cyproheptadine, which has an appetite stimulant in it. That's important if kitty isn't eating because it can't smell due to the URI. And my vet also told me to squirt saline drops in their noses to ease the dryness and stop the bloody noses. Yeah, right. That was fun. I got more on me than in them. But it did help.