Which type of medication administration is known for its prolonged delivery over time?

Infusion is known for its prolonged delivery over time because it involves administering a fluid continuously into a patient's bloodstream. This method allows for consistent and controlled levels of medication to be maintained over a period ranging from several hours to several days, depending on the treatment plan and medication used. Infusions can be delivered through various means, including intravenous (IV) access with pumps or gravity feeds, ensuring that therapeutic levels of medication are sustained effectively.

In contrast, other methods of medication administration, such as intradermal, subcutaneous, or intramuscular injections, typically provide a one-time dose of medication, leading to more immediate but shorter-lasting effects. While subcutaneous injections can lead to some sustained release through various formulations, they do not offer the same continuous delivery that an infusion does. Each of these other methods is designed for different therapeutic needs, but when it comes to prolonged and consistent medication delivery, infusion is the ideal choice.