Cardiological drugs are necessary for the treatment of the cardiological diseases such as hypertension, heart failure, arrhythmia, myocardial infarction and so on. But they have also side effects, ranging from mild to severe result. This document describes the cardiological drugs regarding the pharmacological benefits and the side effects, the epidemiological aspect of cardiovascular disease, because understanding them are important for prescription of drugs by doctors. Some effects of cardiological medications are so severe that they can lead to hospitalization and poor prognosis. One of the worst side effects is death. Therefore, Adequate knowledge of medications, their function, and their side effects are important in the healthcare profession.