There is incredibly little information regarding CBD-A or CBD-Acid and nausea. I am certain in large part that is due to it being solely plant based molecule. I have had several personal communications in which CBD-A has been suggested as an option for treating the nausea of chemotherapy and perhaps other nausea.
I came across this article recently. It is clearly not a very clinically oriented one, but it is one little piece.
In addition, I now have two patients on low doses of CBD-A where THC and CBD failed to help with nausea. I do not have adequate data back, but will report it when available.