Anti-infective Medications Practice Test

The main concept here is recognizing an infusion-related reaction unique to vancomycin and how to prevent it. Red man syndrome is a histamine-mediated reaction that occurs when vancomycin is infused too quickly. It shows up as flushing and erythema of the face, neck, and upper body, sometimes with itching and even low blood pressure. It’s driven by the rate of administration rather than by the drug’s kidney or liver toxicity, so it’s the adverse effect most associated with the infusion itself.

Mitigation centers on how the drug is given. Infuse vancomycin slowly—typically over at least 60 minutes, and longer for higher doses or when treating large infections—to reduce histamine release. Adequate hydration around the time of infusion supports stable hemodynamics and helps prevent reactions. If symptoms occur, slow or stop the infusion, treat as needed (antihistamines can be used in some cases), and resume at a slower rate once symptoms resolve. While nephrotoxicity and ototoxicity are concerns with vancomycin, they relate to overall exposure and renal function rather than the infusion rate, and hepatotoxicity is not a common issue.