Girlfriend started birth control pill and is throwing up (10 points)?

my thing would be, she can take the pill preferably same time every day, and eat a little later, something not heavy. Try to do it for a week, if she still keeps throwing up, it might be she just needs to switch a pill, let her talk to the doctor and explain the situation, she might be allergic to something. When you start taking those pills it can mess up your period, I mean it can be irregular for 2-3 months, then it should be ok, but not constantly feeling seek...