All the time. It's why I refuse to go get a med change just because 'I don't feel good'. I'm reserving that for something major, like I haven't slept in two days even though I took my pills or I'm throwing up multiple times per week. I have a bipolar friend who changes all the time and I wonder how much is due to not having stability on pills and how much is what the side effects are supposed to be. Aside from how much is the bipolar.