Will marijuana treat nausea in chemo and HIV patients?

Yes, BUT. Marijuana can decrease nausea and increase appetite. However, it has estrogen-like effects which makes it unsafe for women with estrogen-sensitive cancer. It is also illegal in most states. Marinol is a prescription medication containing the active compounds in marijuana.
Yes. Terminally ill patients who suffer nausea are helped by thc. This is one of the real reasons for medicinal marijuana use. During chemo antiemetic medications are routinely provided by oncologists that are very effective - more so than mj.