
Hi Brent, many years ago I had an Irish Setter bitch that was prescribed Vivitonin following a stroke too. As far as I remember, it increases cerebral blood flow. Once commenced, it should not be stopped, it should be regarded as a lifelong treatment. My bitch recovered well and survived another 12 months, before suffering another stroke at which point I chose euthanasia. By this time she was 13 years and 10 months old.
Good luck to you and your boy.
Dawn R.