Marijuana and chemo: how do they interact?

Why do some folks on chemo decide to mess with herbal supplements? And if they actually take them, can it cause some bad reactions with their meds?

Thanks.

Supposedly works for nausea. No clue about drug interactions though.

For some people, it’s a total nuisance; for others, they couldn't care less; and then there are those who find it actually helpful—perhaps even a bit of a relief for their nausea or general discomfort.
It really is a deeply personal matter.

I know there's one of those natural alkaloids—a cannabinoid, specifically—found in cannabis that people use when it's diluted for these kinds of issues.