Lately my cat is drinking loads of water. Could this be because of the prednisone I give her to treat the IBD? Should I call the vet? I actually see her drink and she drinks really a lot. (she is nearly 8 years old)

I'd call the vet to get some more advice....

btw, I (human) take pred and it doesnt increase my thirst...

I’ve been to the clinic, my vet works at this clinic, the assistant looked it up and told me it was because of the prednisone. Will it be the case she still drinks a lot of water after I quit giving the prednisone, we’ll have to take a blood sample. So now I’ll wait and see…

I'd get your cat checked out at the vet. Could be kidney or diabetes as both can cause a cat to drink more than usual. Also a cat that feeds on mostly dry food drinks more water.
Good Luck,
Mary

Since a few days I gave Moeke ½ a tablet of prednisone instead of 1 tablet. All by prescription and she drinks less now. Still monitoring.