Best Anti Nausea Medicine For A 9 Month Dog That

best anti nausea medicine for a 9 month dog that never has been in a vehicle. Coming home she emptied her stomach 5 times did not pup for 2 days this AM had a regular BM. took her to the park 2nd ride and she was sick in just 3 miles. I took the rear seat out of my truck and going to place a crate for her but I wanted to know best anti nausea to give for longer trips until comfortable with riding.
Symptoms are excessive saliva, ears that are 8" soaked. She shakes. I do not think she is afraid but the motion or what it is. I have had many dogs and would be consider an excellent handler but this is a new chapter for me Help