The United Patient's Group, a resource for alternative medicine, on its page titled "Nausea and Vomiting," available at (accessed Mar. 18, 2015), state:

“There is strong evidence that the cannabinoids naturally produced in the body play a role in suppressing nausea in normal circumstances, and intake of cannabinoids from medical marijuana during episodes of nausea can also effectively relieve symptoms… Inhaled medical marijuana achieves superior results in reducing nausea and vomiting over synthetic alternatives…

The body absorbs medical marijuana quickly because it is similar to the cannabinoids the body naturally produces. More cannabinoids are absorbed in inhaled form than in ingested form, since the body attempts to metabolize any ingested medication before absorption.”

Mar. 18, 2015