You mentioned side effects, are you aware of any long-term side effects of these two agents?
Glucosamine and chondroitin seem to be, in safety studies that have been done in the United States, basically as safe as taking placebo. Reported side effects include; stomach upset, gastrointestinal upset and skin rash, but these are infrequent and if they were to occur the supplement could be discontinued.
Glucosamine should not be taken by people with a history of allergy to shellfish. Levels of the blood-thinning medication, coumadin, may be affected by chondroitin sulfate. Recent reports have shown that glucosamine might elevate insulin levels in diabetics.
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