Denamarin Side Effects. Denamarin® advanced should be given orally as directed by your veterinarian. What are the side effects of denamarin in dogs?

33,34 while mild side effects, such as gastrointestinal upset, itching and headache, have been rarely reported in primates, 33,35,36 no side effects have been noted in dogs or cats. Lack of appetite or vomiting. What does denamarin do for my dog?