we have been with our pug on a road trip Baltic / Sweden, which means a lot of 100 Km far, because the dog is very restless while driving, I was about 1 week before departure, the tablets and lo and behold, he slept a lot while driving. Although we have made a lot of breaks where Puggie could run out, but I also think that the result Duch these tablets came. So I would buy them again at any time.