It has been recently announced by drug maker Merck that their drug, which was considered to prevent heart attacks, has been found to be having some serious problems. Due to this, they are going to ask doctors across the world that they should not prescribe the drug anymore.

A clinical trial of the drug Tredaptive was carried out. The drug's main ingredient niacin has been found to be ineffective in preventing heart attacks. In order to reach at the above given result, the drug was tested on more than 25,000 patients and for more than four years.

The drug, which is not prescribed in the US, is prescribed in more than 40 countries. It is said to increase good cholesterol and lower bad cholesterol and those, who have been prescribing the drug for a number of years due to the same quality are stunned to know the study findings.

Cardiologist Dr. Steve Nissen from the Cleveland Clinic said it was shocking to know that the drug was unable to improve patients' condition.

The study has found that the drug Tredaptive is not only ineffective in preventing heart attack, but is also capable of causing a number of side-effects.