Cardiovascular toxicology deals with the adverse effects on the heart or blood systems which result from exposure to toxic chemicals. It describes safety data of detrimental effects of new cardiovascular drugs. Cardiovascular pharmacology manages the drug of heart illnesses. Cardiac drugs are utilized to treat states of the heart or the circulatory or vascular framework. Many classes of cardiovascular operators are accessible to treat the different cardiovascular conditions. Pharmacology of vascular endothelium deals with alterations of endothelial cells and the vasculature play a central role in the pathogenesis of a broad spectrum of the most dreadful of human diseases, as endothelial cells have the key function of participating in the maintenance of patent and functional capillaries.