The common side effects of glucosamine chondroitin include nausea, diarrhea, constipation, stomach pain, hair loss and puffy eyelids. More serious side effects are irregular heartbeat and swelling in the legs, notes Drugs.com.
Patients should seek medical attention immediately if they show any signs of an allergic reaction to glucosamine chondroitin, such as hives, breathing difficulty and swelling of the face, tongue, lips or throat, explains Drugs.com.
Patients who use insulin or a blood thinner such as warfarin should not take glucosamine chondroitin glucosamine without first consulting their health care practitioner. Chitosan, a weight loss product, can make it difficult for the body to absorb chondroitin, and patients should avoid taking it while using glucosamine chondroitin. Patients who suffer from diabetes or any bleeding disorder need to consult with their doctor before using glucosamine chondroitin, as do patients who are on a low-salt diet, or who are overweight, states Everyday Health.
Chondroitin is a substance that occurs naturally in the body, and is formed of sugar chains. It helps the body maintain fluid and flexibility in the joints. Glucosamine is sugar protein, and it helps develop and renew cartilage. The combination of glucosamine and chondroitin promotes healthy joints and is used as a nutritional supplement to help with osteoarthritis and other inflammatory joint disorders, notes Everyday Health.