My oncologist prescribed me 4 anti nausea drugs and Told me to take the Dex an extra day. I also found that I had heartburn so got Pariet for that. (Don't forget prunes or a laxative!)
foodwise - I forced myself to drink lots of water to flush it out. I put lemon in the water. I drank ginger ale. Couldn't stand the ginger tea. I ate water crackers and Lebanese bread.
Other thIngs I did - I sucked on Lebanese bread (having something in my mouth stopped the nausea momentarily). Going outside, going for a walk helped. I didn't try and eat healthy until the nausea went (days of nausea is hard enough!)
i counted the days till it was over.
Best wishes.