Fenoldopam is primarily used in clinical settings for its ability to rapidly lower blood pressure. It is often administered intravenously in hospitals to manage hypertensive emergencies, where immediate reduction of blood pressure is critical to prevent organ damage. The drug works by dilating blood vessels, which helps to decrease blood pressure effectively and quickly.

Additionally, Fenoldopam is sometimes used during surgical procedures to maintain controlled blood pressure levels, particularly in patients who are at risk of complications from high blood pressure. Its quick onset of action and short duration make it a suitable option for acute management in these scenarios.

In some cases, Fenoldopam is also utilized to protect kidney function in patients undergoing procedures that may compromise renal blood flow, such as cardiac surgery or angiography. Its ability to improve blood flow to the kidneys helps in reducing the risk of acute kidney injury.

Overall, Fenoldopam is a valuable tool in emergency and perioperative medicine for its potent antihypertensive effects and renal protective properties.