"kitkat via CatKB.com" u26561@uwe wrote:

My cat just got back from spending the weekend at the vet's because he needed
SubQ fluids and antibiotics -
I know my cat's tongue was red - now it's purple - think its the meds or a
reaction to the meds?

I'm assuming the vet would've noticed this before otherwise she won't have
sent him home. anyone else ever experience this?

It might be from the meds or something he ate while there. (My tongue
turns purple when I eat blueberries.)

A purple tongue could also be an indication of shock (a drop in blood
pressure and the blood not picking up enough oxygen). What color are
his lips and gums? If they're a healthy normal color, I wouldn't worry
too much about it, but I would monitor it closely.

Another possibility is that he's developed a fungal infection on his
tongue. I've never heard of a cat with a mouth fungus, but we people
sometimes get them when antibiotics knock out the beneficial bacteria in
our mouths or when stress has weakened our immune systems, so I'd guess
the same thing could happen in a cat.

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