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Q: How often do doctors give cortisone injections to a patient? A: We try to limit the injection to one every three months for any single joint, but also we like to limit it to a total of six injections a year for the whole body. We know that the cortisone can sometimes weaken or suppress the immune system and, in diabetics, it raises blood sugar.
Plus, if you use cortisone as a long-term treatment, you put yourself at risk for brittle or fractured bones and destroyed joint cartilage. To reduce the chance of side effects, you should avoid exercise after you get a cortisone injection.Along with the side effects you should be aware of when taking cortisone shots alone, there are certain drugs that shouldn't be used at the same time as cortisone.o reduce the chance of side effects, you should avoid exercise after you get a cortisone injection. Along with the side effects you should be aware of when taking cortisone shots alone, there are certain drugs that shouldn't be used at the same time as cortisone.