I had horrible nausea & vomitting after my TBI last year. I couldn't eat or even drink . I took RX meds -- Compazine suppositories & a few injections.
this went in cycles--of very bad few days after TBI & in following weeks to days of feeling a bit better when I'd try to eat, drink. then feeling really sick w/ nausea for while.
I still get episodes of Nausea & vomiting .

GINGER is helpful --if you can get it down. there are other things that can help too.