Has anyone had muscle cramps and pain in the weeks following a cortisone shot?

I just had a cortisone shot in my shoulder 2 weeks ago and have been noticing random cramps in legs and feet fairly regularly since then. I've considered the possibility that it could be an effect of reduction in my vigorous exercise (though usually I tend to have occasional leg cramps after I exercise, and then it's mostly when I haven't been going quite as often); I've considered it could be somehow a result of my sloppy diet lately. But really the cortisone injection seems the most reasonable culprit to me. Found this question doing a google search to see if there's any known connection.