Hi I have a traped nerves in the back of my neck, which is causing muscle spasams im going for a mri scan on wednesday im on diazepam, amitriptyline, naproxen and co codamol, but just lately keep getting a stomach ache then it goes, but is severe when it does come, could it be all the different tablets? I have been off work for eight weeks now so need your advice. Thanks Nick