I've noticed the pop addiction thing too, but not in connection with XAH, with myself. I hadn't had one in a long while, and have been trying to eat better. I caved earlier this week and went to the vending machine in the building and got a Pepsi for the caffiene (coffee still amps my anxiety symptoms too far). Honestly, it tasted like cr-p, but it's been really hard not going back to the vending machine for another one.
Bleahhhhh....