Scientists found that zolpidem, which is sold under the brand name Stilnoct in the UK, is linked with a dramatic rise in the number of life-threatening cardiac events, the Daily Express reported.
Four standard dose pills a year a€" 35 milligrams a€" 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 a€" presented to the world's biggest cardiology conference a€" is the first to connect the drug with cardiovascular problems.
Scientists cannot be fully certain yet that sleeping pills are causing heart problems a€" 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".
--ANI (Posted on 08-01-2014)