NEW! Denamarin for Cats and Small Dogs up to 12 lb (300 Tabs) Surveys have shown that Nutramax is the #1 veterinarian-recommended liver support brand. Two active ingredients in one patented formula. The combination of S-Adenosylmethionine and silybin in Denamarin provides an effective, multi-faceted approach to liver support. No known serious side effects in dogs or cats, even after experimental overdosing. Available in sizes for cats & small dogs, medium dogs, and large dogs