Adrenomedullin is a peptide hormone that plays a key role in regulating vascular tone, blood pressure, and fluid balance. It was first discovered in the adrenal medulla, but it is also produced in various tissues throughout the body, including the endothelium, heart, and kidneys. Adrenomedullin exerts its effects by binding to specific receptors, triggering the activation of signaling pathways that promote vasodilation, diuresis, and natriuresis, which help lower blood pressure and regulate the cardiovascular system. Additionally, adrenomedullin is involved in processes such as wound healing, immune responses, and cellular growth. Its dysregulation has been implicated in a range of cardiovascular diseases, including heart failure, hypertension, and sepsis.