Ok, here's another link and this one had a happy ending. This link is an update from the owner, but owner provided the link to her original thread. I do think there's hope for George!!
http://www.medhelp.org/posts/Cats/kitten-with-head-trauma-update/show/1250095
Opus is right - since George is only 6mos old, there is a much better chance the brain will repair itself. Youth is on his side. I'll see if I can find an additional thread to what Opus found. See you in a bit.
that poor little kitty, I don't know what happened but something sure sounds wrong.....I'm no Vet but I sure have never heard of an allergic reaction like this....? and why was penicillin used anyway? was there an infection to start with?????
Jade instructions above are good and yes we have had others here with brain injuries of all kinds, I was trying to find some of these old posts....here is one you can read on sucessful outcome after an INJURY to the brain...
IMO...even one caused by medication can eventually come around in such a young kitten...PLEASE keep us informed of how kitty is doing and we'd be glad to help in anyway we can with your questions...and I will search for more posts too.
http://www.medhelp.org/posts/Cats/blindness-due-to-blow-or-injury/show/1338047?personal_page_id=1770406#post_6183555
Hello and welcome to our cat community. Oh my, I am so very sorry this happened. Hmm...we've seen something like this before on the forum, but I think it was due to the anethesia. What kind of prognosis did your vet give you? This may simply be a matter of time and he could snap out of it, but I really don't know. One other thing - there has been a drug discussed called Manitol that's been used for head injuries, but I have no idea if this would be an option for your boy in this case. I believe it reduced swelling on the brain.
Also, it's very important George gets enough nutrition even if you have to syringe feed. A cats liver and other organs will begin to shut down quickly w/o enough nutrition. Sadly, we've seen that happen here on the forum many times. I hope your vet discussed this with you.
I would keep George under tight supervision for now - I'm sure you are. You just don't want him to hurt himself inadvertently. Please keep posting and let us know of George's progress. Hopefully, someone else who has some knowledge about this will see your post. Very best of Luck. Poor kitty.