Happy Traveler Capsules The world can be a scary place for a pup! Add our natural herbal calming formula to any stressful situation and watch the worry wash away. Ark Naturals’ Happy Traveler® capsules help ease motion sickness during long car rides or jet setting around. Made with four powerful calming ingredients, we guarantee one Happy Traveler. Active Ingredients per capsule: Valerian (100 mg), German Chamomile (100 mg), L-Tryptophan (100 mg), St. John's Wort (50 mg). Inactive Ingredients: gelatin (capsule), magnesium stearate, microcrystalline cellulose, whey.