A new study suggests long-term melatonin use may be linked to heart failure, but experts say more research is needed before drawing any conclusions.
Researchers reviewed health records for tens of thousands of adults with chronic insomnia and found that people who took prescribed melatonin for more than a year had a higher chance of heart failure over five years.
The study also found that melatonin users were more likely to be hospitalized for heart failure and die of any cause compared to those who didn't use the sleep aid.
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However, experts stress that people shouldn't panic yet. They emphasize that the results show an association, not causation, and more research is needed to

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