As a former pharmacist I used to recommend mint/peppermint, flat gingerale or ginger tea and something called SeaBands (http://www.sea-band.com/seaband.htm). You can buy the Seabands at your local pharmacy. But if the N&V doesn't stop there are medications that your daughter can use. There comes a point in any pregnancy where if she isn't eating or keeping anything down it can cause problems for the baby (because they are not getting enough nutrition). If this continues past three months, she should re-evalute the situation with her MD.

Good luck