Federal regulators said Thursday they found bacterial contamination in two more drugs produced by the Framingham compounding pharmacy that made the injectable steroids blamed for the national meningitis outbreak. The additional New England Compounding Center products are preservative-free betamethasone, a steroid used to ease back pain, and cardioplegia solution, a medication used in heart surgery. Federal investigators identified bacteria in three separate lots of betamethasone and in a single lot of cardioplegia solution.
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