I have heart disease and kidney problems?

but i'm wondering if it would be safe to take glucosamine, chondroitin and msm complex

Glucosamine and chrondoitin appear to be safe as no serious side effects have been reported however the minor side effect of diarrhoea was noted. There is a possibility that glucosamine may worsen insulin resistance so patients with diabetes should be monitored carefully. Chrondoitin should be avoided by patients with bleeding disorders as it can aggravate these problems. If you take warfarin it should be avoided.

So long as you dont take warfarin or have any bleeding disorders it is safe for you to take these supplements. Source(s): pharmacist

You may want to check with your doctor, but the supplement you mention is for joints and would seem to be a benefit.
The first thing you should do is check with your doctors. But I don't think those things will hurt you. The glucosamine will help stabalize sugar levels, the chondroitin is good for rebuilding joints and cartiliage and I think the msm complex assists with both of the previous two things.
Check both your condition and your current prescription with the pharmacist (not the sales assistant at the chemist) before purchasing these tablets. The pharmacist knows far more about drug interaction than a doctor would (His training is based on science rather than bedside manner).