This book provides an in-depth exploration of the pharmacology of drugs acting on various systems of the body, with a particular focus on the cardiovascular, urinary, and endocrine systems. It covers the electrophysiology of the heart, congestive heart failure, antihypertensive drugs, anti-anginal drugs, and treatments for conditions such as arrhythmia and hyperlipidemia. The book also delves into coagulants, anticoagulants, and drugs for blood-related conditions, as well as diuretics for the urinary system. In the field of autocoids, it addresses histamine, prostaglandins, and leukotrienes, along with NSAIDs and anti-gout agents. Additionally, the endocrine section explores hormone analogs, insulin, corticosteroids, and reproductive hormones. The book concludes with detailed information on bioassays for assessing drug efficacy, including insulin and oxytocin