Does the nausea medication help at all? Or does he just suddenly vomit without having nausea a while beforehand?
My mother went through chemo and she would get nauseous from the treatment. She would stuff tissues into her mouth to keep from swallowing her saliva, which I guess has chemicals that trigger vomitting. Anyway, I have tried it myself when nauseous and it works every time. I don't know what your brother feels like before he vomits though, or if the same reflex is causing him to vomit... it could be something in his stomach rather than chemicals from the saliva? I don't know. Maybe this will at least help him keep his food down, even if it doesn't stop his nausea.
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