Which of the following is a complication associated with spinal anesthesia?

Rapid hypotension is a notable complication associated with spinal anesthesia due to the effects of the anesthetic on the sympathetic nervous system. Spinal anesthesia blocks the nerves that control blood vessel tone, causing vasodilation and potentially leading to a significant drop in blood pressure. This drop can occur quickly after the administration of the anesthetic, especially if larger doses are used or if the patient's fluid status is not optimized prior to the procedure. Monitoring blood pressure and preparing to manage hypotension is essential in any patient receiving spinal anesthesia.

Other complications exist, but rapid hypotension is particularly common and significant, often requiring prompt intervention for stabilization.