My dog would always vomit on car rides but not anymore! These wafers really do work. You need to feed it to your dog at least 30 minutes before your car ride since they do need a chance to get into their system. I have noticed that they will calm my dog a bit, like taking the edge off. However, they do not make him slow or drowsey which is fantastic because I still want him to feel like himself and be able to play and run around. I love this product!!!