I am so sorry. But I had a feeling he would do that. We talked about that, remember? if they are watching him closely, he will be fine. the seizure is one side effect from going cold turkey. If you remember, my son went back to Texas a couple weeks ago and had to dry out cold turkey for 4 days!! He was sick and miserable. He now swears he will NEVER take Xanax again. Well, we will see. the withdrawals can be bad, if you've taken them a while and it only takes a couple weeks to become addicted, that's why I say to ALL...don't ever take them...even if a doctor presscribes them.....NO< NO< NO!!!! His worst days are prob over with now. and who knows, maybe this will do it for him. that seizure could have killed him....and Yes seizures do damage to your brain. When he gets out, talk him into going to doctor and getting a complete physical, cat scan and all!!! This may be his turning point. It will take months, maybe a year for his head to clear....and some people's head never clears of they've done damage. I pray for him and hope this is his wake up call.