I have a disk bulg and was prescribed narcotics, and injections in my lower back at about 6 mo intervals. I have abruptly gone off my medications and went on 2 300mg per day working up to pain relief. I just received injections so pain is levels are tolerable. the neurontin is give nuvaring me sever anxiety, raising blood presser to high levels for me, insomnia, nervousness, How long before these side affects go away? Any one else experience this?