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What is it? Overview Usage Side Effects and Warnings

Chondroitin Side Effects and Warnings

Written by FoundHealth.

Safety Issues

Chondroitin generally does not cause much in the way of side effects, besides occasional mild digestive distress. However, there is one case report of an exacerbation of asthma caused by use of a glucosamine-chondroitin product. 1 In addition, there are theoretical concerns that chondroitin might have a mild blood-thinning effect, based on its chemical similarity to the anticoagulant drug heparin. Reassuringly, there are no case reports of any problems relating to this, and studies suggest that chondroitin has at most a mild anticoagulant effect. 2 Nonetheless, prudence suggests that, based on these findings, chondroitin should not be combined with blood-thinning drugs, such as warfarin (Coumadin), heparin , and aspirin , except under physician supervision. In addition, individuals with bleeding problems, such as hemophilia, or who are temporarily at risk for bleeding (for example, undergoing surgery or labor and delivery) should avoid chondroitin.

Interactions You Should Know About

If you are using drugs that impair blood coagulation, such as warfarin (Coumadin), heparin , aspirin , clopidogrel (Plavix), ticlopidine (Ticlid), or pentoxifylline (Trental), do not use chondroitin except under physician supervision.


  1. Tallia AF, Cardone DA. Asthma exacerbation associated with glucosamine-chondroitin supplement. J Am Board Fam Pract. 15(6):481-4.
  2. Abdel Fattah W, Hammad T. Chondroitin sulfate and glucosamine: A review of their safety profile. JANA. 2001;3:16-23.


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