I have had head &jaw pressure for 3 and one half yeas ever since I had a tooth implant. I have been to another dentest and an oral surgeon and no one can find the problem. I've gone to a headache clinic and put on amtriptyline and nortriptyline and taken everything I can over the counter with no relief. I read where fiorinall wth codeine might help. I am already taking clonazapam for 4 years. It never goes away. It's constant. I've had a CT scan and an MRI. Nothing. Been to chiropractor and sports therapist. Don't know what to do. Any suggestions?