Do you need calming help for your dog during stressful times, like the vet office, fireworks shows, or thunderstorms? Vet's Best Comfort Calm Chewable Tablets are made with high-quality, naturally derived ingredients (tryptophan and valerian root) to help soothe and relax your dog. Safe for any breed of dog 10 months or older when used as directed. Formulated by a veterinarian for optimal absorption and digestion, made in the USA, and carries the National Animal Supplement Council's seal of approval. Active ingredients: 5-hydroxytryptophan 25 mg, valerian root 25 mg. Inactive Ingredients: Apple Pectin Powder, Brewer's Yeast, Calcium Carbonate, Cellulose, Liver Powder, Magnesium Stearate.