Calcigard Retard is a calcium channel blocker. It works by affecting the movement of calcium into the cells of the heart and blood vessels. It is used to treat high blood pressure and other heart complications. The medicine should be taken in conjunction with a proper diet and regular exercise. It is also used in managing chest pain. This medicine belongs to a drug group that effectively slows down the calcium activity in the blood vessels. Therefore, it helps in relaxing the heart muscles by increasing the flow of blood. This drug should only be taken if it is prescribed by a doctor. Detailed information on current health problems, allergies as well as medication should be provided before the drug is prescribed. For instance, patients suffering from a severe case of coronary artery disease are generally not prescribed with this medication. It is also not prescribed to the patients who have recently had a heart attack.