I am fairly new at this also. I was diagnosed and put on 100mg Sprycel in early March. Don't want to make anyone feel worse, and remember, everyone reacts differently, but I can tell you I experienced severe headaches, nausea and exhaustion in the beginning. I bascially couldn't do anything but lay on the couch drifting in and out of sleep. For me, every now and then I would have a good day - no side effects, but not many. They did come gradually with time. It was very frustrating for me because I felt like I wasn't getting better, faster. I started back to work at an office job in July and still have not been able to put an entire week together. I too experience shortness of breath and some chest pain/pressure even now, here and there, but it was much worse in the beginning. I'm in the process of changing specialists and the shortness of breath also seems to be getting better so I will wait until I see my new onc. But as Pat said, I have read several times about the risk of PE. It's nothing to fool with and if you wait too long, I think possibly can do permanent damage. Always at least worth a call.
Glad you found this site. You can get some great information here. And for me, even tho I have a very supportive family, I still felt very alone in this until I found this site. People are very open, honest and friendly here, as I'm sure you'll see.
Wish you both all the best! and don't forget to show this site to her when she gets feeling better.