Dogs are prone to varying levels of stress, anxiety and nervousness depending on their immediate environment. Vet's Best Comfort Calm helps your dog relax during stressful moments. Effective calming formula No adverse side-effects Contains natural calmatives This calming formula reduces tension and anxiety resulting from stressful activities and from high-decibel noises like thunderstorms and fireworks. It promotes relaxation without inducing drowsiness. The product comes in a chewable tablet form and contains tryptophan, a highly effective natural calmative that reduces stress and anxiety of motion, noise and travel. It also contains valerian root and chamomile. Greeks in ancient times used valerian root to cure nervousness and sleeplessness.