Have been taking Azor with exceptional results for the past couple of weeks after my BP meds quit working. For the past several days, I have been awakened in the middle of the night with a headache in the back of my head, similar to what you would have with a hangover. After taking a couple of Tylenol it eases enough to go back to sleep. Just wondering if this is a side effect others have experienced with Azor or not.