Dexmedetomidine is a medication primarily used for sedation in patients undergoing surgery or in intensive care settings. It works by selectively activating alpha-2 adrenergic receptors in the brain, leading to a calming effect without causing significant respiratory depression. This drug is often preferred for its ability to provide sedation while allowing patients to remain somewhat alert and responsive. Dexmedetomidine is typically administered intravenously and is known for its rapid onset and short duration of action, making it suitable for various medical procedures.