VETIQ Defurr-UM is a combination of natural ingredients which gently lubricate the system giving a mild laxative effect that removes the hairball and reduces future blockages. The Defurr-UM paste coats the swallowed hair and the stool and allows it to pass through the digestive system of cats and other pets. VETIQ Defurr-UM also contains vitamin E and prebiotic fibre inulin.