Struggling pharmaceutical company Zogenix Inc. has won the right to sell its Zohydro ER medication in Massachusetts, after Gov. Deval Patrick issued an executive order prohibiting the sale of the painkiller, saying that it could lead to drug-abuse problems.

The ruling from the U.S. District Court in Massachusetts says that imposing regulations to restrict access to the drug, which was approved by the U.S. Food & Drug Administration in October 2013, violates constitutional law because the FDA is the only regulatory body that is allowed to determine medication approval.

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