I have a 12 year old cat that up until recently has been a great cat and with no illness. Well the past two weeks she's been having a few accidents in the house. She's thrown up and has had diarrhea. What could be wrong with her? I'm really concerned. Thanks!
I agree with PEN that if it's been going on 2 weeks or more, then a vet visit is in order. Especially since she is older. Be ready to describe how often, how long, and what she is vomiting up when you talk to the vet. Two of mine had similar symptoms but they were only sick for 2 days each and they are young. It was like a virus or something and they got over it before I got to the vet's office. I sent you a PM with an article of the possible conditions she could have and some are serious. My friend's 12 year old cat had a similar issue and it was as simple as switching her to a prescription food and now she's doing much better. But you won't know for sure without some blood tests and an exam.