Sounds a little bit like migraine's. I experience pain in my neck muscles feel like there are steel cables in the neck that are over tensioned (very stiff neck) & severe pain in one or both eyes, stuffy nasal, light & sound sensitivity, etc. Sometimes vomiting as a reaction to moderately severe pain. If you are having similar symptoms the meds are causing migraines like Gabapentin did to me. Imitrex works well for me. Other things like food additives (for me: MSG & EDTA) can cause all kinds of maladies. I suggest one keep a diet diary to hone in on any food allergies or additives that maybe triggering or causing any maladies. The FDA & big pharma, etc are not your friends. God bless