This document summarizes various classes of cardiovascular drugs used to treat conditions like hypertension, angina, heart failure, and arrhythmias. It describes antihypertensive drugs like diuretics, sympatholytics, vasodilators, ACE inhibitors, and calcium channel blockers. It provides details on specific drugs in each class, their mechanisms of action, uses, and potential adverse effects. Guidelines for clinical use of antihypertensive drugs including stepped care, monotherapy, considerations for age and ethnicity, and treatment of malignant hypertension are also mentioned.