Nitroprusside is a powerful intravenous medication used in severe cases of acute heart failure to quickly lower blood pressure and reduce the workload on the heart. It works by causing rapid vasodilation, which decreases both preload and afterload, helping the heart pump more effectively and improving symptoms such as shortness of breath. Because it acts within minutes and is given as a continuous IV infusion, it is typically used in intensive care or closely monitored hospital settings. Blood pressure must be monitored carefully since the medication can cause significant hypotension if the dose is too high. It is usually reserved for more severe cases when rapid blood pressure control and afterload reduction are needed.