Headaches
Yes, it can be. The headaches could be a result of the change of diet, particularly if you ate a lot of sugar and have cut it out. The rise in BP could be a result of the pain -- when we hurt, our BP tends to go up. This should even out after a couple of days, once the sugar gets out of your system. If you're not better by Monday, or if the headaches become excruciating, call your doc. It's not likely, but you could be having an allergic reaction to something in the liquid diet formula. Most everyone I know had headaches when we started the liquid diet, too, but after the third day, they went away. Good luck!