
Hi Lisa, it's difficult to remember for sure about how quickly I saw improvements in my bitch Holly, because this was all back in 1994-95. I can't think there was a problem though. Vivitonin is a drug that improves cerebral perfusion, so it may well be reasonable to think that things seem worse before they get better, simply because the dog has to cope with a change. I think it probably takes a little time to establish whether or not this treatment is going to be helpful. Stick with it and fingers crossed it will all work out.
What I would say though, is, dont take him off it without consulting your vet first. I hope he starts to improve soon. :)
Dawn R.