First, she wants to eat all the time when she is awake. Also, the abrupt change in our nursing schedule has left me with soreness that I suspect to be early signs of mastitis.
Luckily, I saw this third side effect coming and packed extra clothes for Disneyland today. No eating all night means no pooping all night, which means when she does poop - yikes. We were just about to board a swinging gondola on Mickey's Fun Wheel when it happened. She was wearing two onesies, so it was hard to see how bad it was at first. By the time the ferris wheel had gone around once, I had a naked, crying baby face down on my lap, and her undershirt and half a pack of wipes in the motion sick bag so kindly provided.
Mind you, our car is swinging wildly this whole time. I didn't know what to hold on to: the clean clothes and diaper on the seat, the dirty bag sliding across the floor, the naked baby, the kids, or my lunch.
We managed to get her dressed on the second trip around. As we exited, Dalton picked up the white motion sick bag, with the top nicely folded down. "I bet he thinks it's donuts," I said. But he obediently put it in the trash.
John and I were both so nauseous from swinging while occupied, or maybe just the mess of it all. We didn't do many rides because of it, but luckily I was feeling well enough to use my fast pass for Radiator Springs Racers for the first time. Yay!
Sienna's second explosion happened in the car on the way home. It's a lot easier to deal with these sorts of things in the comfort of your own home than when swinging 150 feet above the ground. Especially since, by this point, a bath was clearly in order. 
Sat Jan 19 2013 22:20 A Diaper to Remember:
I blogged several days ago that Sienna had nearly slept through the night. She's continued to do so, for four nights in a row now. All the sleep is lovely, but it does come with side effects.