Wow that has got to hurt having that fusion in your neck. I am glad to see you came to the pain management board and welcome aboard. As for the drugs you mentioned:
Neurontin (gabapentin) - this is an anti-seizure medication also used to treat bipolar disease as well as nerve pain. It effects certain parts of the brain that control pain. It can be very effective on nerve pain for certain people. I was on it and it did not do much for me but everyone is different. It can cause side effects of drowsiness, sedation, dry mouth, dizzyness, lightheaded.
Norco (hydrocodone APAP) - this is a version of hydrocodone similar to Vicodin and Lortabs. Norco tends to have higher strengths and less acetaminophen in it than the Lortab or Vicodin. It is a Schedule III narcotic pain medication and should be taken exactly as prescribed. The side effects can be: dizziness, lightheaded, euphoria, drowsiness, sedation, nausea, vomiting, and itching.
Zanaflex - a muscle relaxer type medication that is effective for muscle spasms and tightness in muscles. I have never take this one but I think it is a controlled substance too (Schedule III or IV) and should be taken only as prescribed. Side effects: dizziness, drowsiness, sedation.
Please be EXTREMELY CAREFUL IF YOU ARE GOING TO DRIVE and be aware of how you feel on these medications. Take these medications exactly as prescribed and do not take them more often than prescribed. If your pain is not being controlled very well, please call your doctor and let them know to see if they will increase or change your medications. If you have any intolerable side effects while on them, please call your doctor. If you have any other questions, feel free to ask. There are alot of caring and knowledgeable people on this forum.
brian