"As bad as people think the problem of opioid use is, it's probably worse," said Wayne Ray, the report's lead author. "They should be a last resort and particular care should be exercised for patients who are at cardiovascular risk." The drugs can slow breathing and can worsen disrupted breathing that occurs with sleep apnea, potentially leading to irregular heartbeats, heart attacks or sudden death. In 2014, there were more than 14,000 fatal overdoses linked with the painkillers in the U.S.
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