I am sick and nauseous i keep vomiting and gagging. i'm pregnant and taking zofran (ondansetron). i have taken 4 pills today and not working. anything else to take?

See a doctor: Or go to emergency department. There are other medicines that can be prescribed--my first choice is usually promethazine--but you may need some IV hydration with urgency.

A few ideas: There's Reglan (metoclopramide) you can try. And a new drug that's on the market called diclegis. Here's a great website discussing your options: http://www.Uptodate.Com/contents/nausea-and-vomiting-of-pregnancy-beyond-the-basics.