Prednisone is known to increase sugar levels, and is one of the side-effects we look out for. Certainly if you are at high risk of diabetes, then it is likely to bring it on sooner, but can also increase the sugar levels if you are not at high risk. The question is whether the prednisone caused your diabetes or just brought it on sooner, and at this stage the only way of deciding that is too stop the prednisone and seeing whether your sugar levels return to normal or not. If you are unable to stop the prednisone as this will cause your lungs to worsen, then it makes no difference as you now have diabetes and need to control the levels with lifestyle changes and most likely medication.
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