to Purrs
Whats your cats name?
Like yvonne I have no experience of this but know many on Purrs have and believe there is another med they can take....maybe in Yvonnes links.
As far as the stroke is concerned, cats are like people and it depends on the severity and how your cat has been affected, I hope not too badly so that he/she can still have quality of life.
At the end of the day its the quality of life that determins what you do and am sending many Purrs vibes and hope that it will be OK.
Have you stopped the Vidalta, and has the vet mentioned the other drugs? Seems doseage problems occur and all cats react different.