You can feed your dog an appropriate amount of motion sickness medicine before riding in the car to keep your dog calm and reduce the symptoms of motion sickness. If your dog suffers from severe motion sickness, it is recommended not to take your dog out as much as possible.
Care Hacks
What to do if your dog vomits after carsickness

If your dog gets car sick and vomits, you can leave a small gap in the window to keep the temperature inside the car cool and the air fresh, reducing your dog’s discomfort. If conditions permit, you can stop the car immediately and take the dog to an open area to let the dog relieve its physical discomfort.