Healthy cat died suddenly.

Why did my cat die?

I came home from work today to find that my cat had died. I was hoping you might be able to help me figure out what happened. He was on my bed and under my covers (he crawls under there sometimes). His legs were outstretched in a normal sleeping pose. One eye was closed, the other partially open. Pupils dilated, mouth closed. The sheets were soaked with urine which I guess he passed when he died.

This morning he was acting perfectly normal and there was no indication that anything was wrong. The only health problem he's ever had is that he can sometimes throw up several times in a row, but this only happens about twice a month. Vet looked at him and thought it might be allergies and gave him a steroid shot. This was about 4 months ago.

He's an indoor cat, in case that matters. He was a little overweight at 18 lbs. Had some anxiety issues, too. That's about all I can think of. Oh and I don't think there were any sources of poison he could have come into contact with. I take paroxetine 25mg. I suppose it's possible I dropped one which he ate, but that seems unlikely.

Thanks for the help,

John