My doctor does not think it's withdrawal from Protonix. She feels they are the result of my perimenopause (I'm 43). But after reading some of the stories in this room, I should feel fortunate they are tension and cluster headaches and not migraines. My doctor says I should take Protonix again on an "as needed" basis to protect my stomach from NSAIDS, which is what has tamed some of the worst headaches. She also reccomends coffee before exercise (one of the triggers). I haven't had a bad headache in four days (the pressure persists though), so I thought I should give you guys an update.