Cosequin DS Chewable Tablets contain glucosamine hydrochloride and sodium chondroitin sulfate. The ingredients in Cosequin work together to help support healthy cartilage. Cosequin joint health supplements are brought to you by Nutramax Laboratories Veterinary Sciences, the #1 veterinarian recommended supplement company. Source: Among retail brands. Survey conducted among small animal veterinarians who recommended oral joint health supplements. *Source: Survey conducted among small animal veterinarians who recommended animal supplements.