Vetalogica Feline Tranquil Formula, 18g The Calmaphan complex is a proprietary blend of Tryptophan and B-Vitamins, which helps to maintain calm emotions. Containing natural ingredients, this scientific formulation has been developed by scientists, veterinarians and flavour experts. Delicious tasting chicken flavoured tablet is just like a treat. Uses Vetalogica's worldwide exclusive Calmaphan technology. Non-drowsy and can be taken at any time.