Function

• According to Drugs.com, the two ingredients of Cosamin DS work in combination to maintain healthy joints. Chondroitin helps joints remain fluid and flexible, while glucosamine helps renew joint cartilage.
  
  

Side Effects

• Drugs.com reports that common side effects of Cosamin DS include nausea, heartburn and diarrhea.
  
  

Interactions

• Certain drugs, including insulin and blood thinners, are known to interact with Cosamin DS and may cause serious side effects. If you are taking any medications, check with your doctor before taking Cosamin DS.
  
  

Health Issues

• If you have diabetes or blot clotting disorders, are overweight or are on a low-salt diet, you may not be able to take Cosamin DS. Check with your doctor.
  
  

Warning

• Many supplements have been found to contain toxic metals or other drugs.