Rimadyl (pronounced “Rim-a-dill�) is a 24-hour, non-steroidal anti-inflammatory drug (NSAID) that is administered once a day. It provides safe and effective relief of pain and inflammation due to canine arthritis, orthopedic and soft tissue surgery. Signs of Rimadyl intolerance may include appetite loss, vomiting and diarrhea, which could indicate rare but serious side effects involving the digestive tract, liver or kid.