I have a three year old female cat who is very sick. not eating or drinking water. has recently had worm treatment. anyone know whats wrong

Take her to a different vet

its the worm treatment.... it takes 4-5 days to feel better. my cats were the same way after the treatment. I won't give them that ever again. maybe you should take her back to the vet or find another vet. if not, all you can do is wait it out...mine are all back to normal now. no worms. eating& drinking& playing. scared me. Don't give her any kind of medicine now ~ just let her rest. try to give her water ~ in an eye dropper , if necessary, but not too much~ she'll probably gag...cats can usually help themselves. let her rest. just keep an eye on her.

If she's obviously sick and the vet said nothing was wrong, see another vet. Like human doctors, sometimes animal doctors are inexperienced with certain things and do not know. A second opinion when you're doubtful can never hurt.

Try some Gatorade, and get her to a different vet ASAP!

don't take her to a regular vet take her to a vet hospital

a treatment takes a while to settle in, this might be even a reaction to the medicine, I think you should try taking her to another vet, hopefully this helps