Denamarin tablets for dogs and cats helps support liver health and helps cell repair and regeneration by protecting the liver cells from cell death caused by liver damage. Denamarin may also be used in other areas of tissue oxidant injury caused by certain toxins or drugs. Denamarin contains S-Adenosylmethionine (SAMe) and silybin. The tablets come in three different strengths; for cats and small dogs, for medium dogs, or for large dogs.