I get occasional headaches and my ENT prescribed Fioricet. He did mention that it contains caffeine, but he thought it wouldn't cause a spike. I don't take Advil or Ibuprofen anymore since I got T. Tylenol doesn't really help too much. He said only take it as a "rescue". So it's not something you want to take too often. I want to get your thoughts on this. Can this cause a spike? Anyone have experience with this? Thanks!!!!