In addition to the above, some use ginger, like making a ginger tea with honey, to help with nausea. I also used marinol, by prescription, which helps with appetite, but also with nausea. Another is to question when the nausea or vomiting starts. It is in the morning, after doing a chore, feeding, lying in bed, etc. to help find a possible contributor. I mainly got ill after raising from bed too soon, so slowed that down, had to reduce the amount per feeding, changed the type of feeding, and Oxycodone pain meds seems to make me sick, still does.

Good luck.