Sleeping pills can increase the risk of heart attacks by up to 50 percent, suggests US study.
![Sleeping Pills Raise Heart Attack Risk Sleeping Pills Raise Heart Attack Risk](https://images.medindia.net/health-images/1200_1000/drugs2.jpg)
Four standard dose pills a year - 35 milligrams - send the risk soaring by around 20 percent.
People taking the equivalent of 60 tablets a year could see the threat jump by half.
The study - presented to the world's biggest cardiology conference - is the first to connect the drug with cardiovascular problems.
Scientists cannot be fully certain yet that sleeping pills are causing heart problems - and the manufacturers say there are no known adverse cardiac reactions to zolpidem.
However, the researchers say the results from a study of more than 5,000 people are sufficiently worrying for "further large-scale and in-depth investigations".
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