but everyone is different and it could make it worse

Dimenhydrinate (Dramamine): Effective for motion sickness and pregnancy-related nausea.

almost forgot that one

Hubby is opioid intolerant they gave him this medication when they didn’t read his chart.

which has been mentioned by the generic name Ondansetron is usually very effective for most people.
When had anesthesia the first time I vomited for hours, finally someone gave me a dose of this and it was miraculous.

I received it later and also administered as a nurse many times and it was impressive.

Aromatherapy helps me a lot. Lavender and lemon are best for nausea, for me.

I only have first-hand experience with chemo nausea. For opioids, in helping someone I love, there was tremendous sweating and loss of fluids, so hot and cold drinks and frequent changes of clothes. Cool washcloths on forehead when the person feels hot.

Herbal teas that seemed soothing included Kava tea and Tension Tamer, maybe because of the suggestion that they are calming. Ginger or peppermint tea and/or lozenges can help. In general, fluids are key.

For eating, there is a "BRAT" diet I was recommended during radiation: bananas, rice, applesauce, toast. At my worst, I could only tolerate vegetable broth and saltines. I don't recommend it for long!