Final answer:
Rapid infusion of vancomycin can cause "red man syndrome" or vancomycin infusion reaction, characterized by symptoms like flushing, itching, hives, and low blood pressure.
Step-by-step explanation:
Rapid infusion of vancomycin can cause a condition known as "red man syndrome" or "vancomycin infusion reaction." This reaction occurs due to the release of histamine from mast cells, resulting in symptoms such as flushing of the skin, itching, hives, and low blood pressure. It is important to infuse vancomycin at an appropriate rate to avoid this reaction.