Red Man Syndrome and what causes it?

Red Man Syndrome and what causes it?

• A. Reaction to IV contrast material.
• B. Rapid infusion of vancomycin causing flushing, erythema, and pruritus on the face, neck, and chest.
• C. Nausea caused by metoclopramide.
• D. Allergic reaction to penicillin.

Answer: (B)

Red Man Syndrome happens when vancomycin is infused too quickly. The rapid infusion triggers non–IgE-mediated release of histamine from mast cells, causing flushing and erythema on the face, neck, and chest, often with pruritus. It’s a rate-related reaction, not a true allergy, so the fix is to slow the infusion (and consider antihistamines if needed). It’s not due to IV contrast, metoclopramide–induced nausea, or penicillin allergy.

Red Man Syndrome happens when vancomycin is infused too quickly. The rapid infusion triggers non–IgE-mediated release of histamine from mast cells, causing flushing and erythema on the face, neck, and chest, often with pruritus. It’s a rate-related reaction, not a true allergy, so the fix is to slow the infusion (and consider antihistamines if needed). It’s not due to IV contrast, metoclopramide–induced nausea, or penicillin allergy.