Patients who experience nausea from chemo are prescribed Marinol which is a non-mind-altering drug derived from marijuana. It is effective, but expensive.

I get nausea with migraines so my anti-migraine medicine, imitrex, comes in the form of a nasal spray. It also comes in the form of injections but I prefer the nasal spray. Non-GI route is the ultimate solution for your problem. Unfortunately, only a few psych drugs are inje,tables, such as risperdal once every two weeks.