Prerenal is a medical term that typically describes a condition that occurs before the kidneys are affected. Other synonyms for this term include pre-renal, renal hypoperfusion, and hemodynamic instability. Prerenal is a condition that can be caused by factors such as dehydration, blood loss, or heart failure, all of which can significantly decrease blood flow to the kidneys. When this happens, the kidneys are unable to filter waste products from the body effectively, which can result in severe health conditions. It is important to recognize the signs and symptoms of prerenal as early as possible to prevent further complications and provide timely medical assistance.