Final answer:
Injectable local anesthetics are delivered intravenously for quick and reliable effects.
Step-by-step explanation:
Injectable local anesthetics are delivered intravenously, which means they are administered directly into the veins. This mode of administration allows the anesthetic to quickly enter the bloodstream and take effect. Intravenous injections are preferred by anesthesiologists due to their speed, reliability, and relatively low pain compared to other routes of administration such as subcutaneous or intramuscular injections.