I had two ketamine infussions for C3-7. I got good relief for about two months. I had the injection two weeks apart. I needed to address my issue surgically as nothing would help on a permanent basis for me. The pain specialist himself could see on the screen what happened to my neck. I thought this was a good proceedure however. The infussion did NOT hurt, though it took some time to do. I was surprised that I did not have pain at the injection site either. Some of the different kinds of injections do hurt. I would ask what you are to recieve, and do the google to find out about it more. I get jittery, so I do look up those things before I do the proceedure. I hope all goes well for you. ginnie