Taking corticosteroids even for a short time can result in side effects like broken bones and blood clots, according to research from the University of Michigan.

Though only a small percentage of both groups went to the hospital for these serious health threats, the higher rates seen among people who took steroids for even a few days are cause for caution and even concern, the researchers say.

The study used data from 1.5 million non-elderly American adults with private insurance. One in 5 of them filled a short-term prescription for oral corticosteroids such as prednisone sometime in the three-year study period. While the rates of the serious events were highest in the first 30 days after a prescription, they stayed elevated even three months later.

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