What type of intravenous administration injects a drug into a small amount of fluid?

Bolus administration refers to the method of injecting a drug directly into the bloodstream in a relatively short period, typically using a small amount of fluid. This technique allows the medication to quickly reach therapeutic levels in the bloodstream, making it an effective choice for delivering medications that need to take effect rapidly, such as in emergency situations.

In contrast, continuous infusion involves administering a steady amount of a drug over a longer period, often using a larger volume of fluid. Intermittent infusion refers to administering doses of medication at scheduled intervals, which also often involves larger volumes. Direct injection is a term that can be interpreted in various ways but typically means injecting the drug directly without the context of using fluids systematically, which does not align with the requirement of using a small amount of fluid for administration. Therefore, bolus administration is particularly suited for situations requiring rapid therapeutic action.