Composure™ Pro is a clinical strength formula to promote calm behavior in cats and dogs. It’s clinically shown to work within 30 minutes and last up to 4 hours.* It features a combination of four effective ingredients including, Colostrum Calming Complex®, L-theanine, Thiamine (Vitamin B1) and L-tryptophan. These ingredients provide cognitive and brain function support that supports calm behavior without causing drowsiness or unwanted personality changes. These tasty chews can be given on a daily or as needed basis and it’s suitable to increase your pet’s dose during times of heightened stress.