Marijuana is legal where I live. Yet broaching the topic with a doctor can be awkward. Where it's legal, you can pick strains for different things like nausea, pain, and not making you hungry. I don't smoke or eat it because I don't really like feeling stoned, but I wondered if anyone had success with it for nausea.

Pot doesn't actually make you hungery. It makes food taste better that leads to you eating more of it. Chemo patients report that food has no taste so they dont eat much. Pot makes things taste "better" and leads to better overall nutrition in certain groups that under consume calories due to medical issues.
Cancers eat sugar and will very quickly deplete yours and this leaves you weak and basically malnourished.

There is some research that shows that the THC in marijuana causes more grehlin to be produced. Ghrelin being one the main hormones that makes us hungry.