Red man syndrome

Red man syndrome (RMS) is a hypersensitivity reaction commonly associated with the administration of the antibiotic vancomycin. It is characterized by flushing, rash, and pruritus that primarily affects the face, neck, and upper torso, hence the name "Red man syndrome".

Etiology

Red man syndrome is not a true allergic reaction, but rather a direct result of histamine release from mast cells. This reaction is most commonly associated with the rapid intravenous administration of vancomycin. Other drugs, such as ciprofloxacin, amphotericin B, and rifampicin, have also been reported to cause RMS.

Clinical Presentation

The symptoms of Red man syndrome typically occur within 4 to 10 minutes after the start of a vancomycin infusion. The most common symptoms include flushing, rash, and pruritus, primarily affecting the face, neck, and upper torso. Other symptoms may include hypotension, tachycardia, dyspnea, nausea, and chills.

Diagnosis

The diagnosis of Red man syndrome is primarily clinical, based on the characteristic symptoms and their temporal relationship to drug administration. There are no specific laboratory tests for RMS. However, differential diagnosis should be made to rule out other conditions such as anaphylaxis and drug eruption.

Management

The primary management of Red man syndrome involves stopping the infusion of vancomycin and providing supportive care. Antihistamines, such as diphenhydramine, can be used to alleviate symptoms. Once the symptoms have resolved, vancomycin can be restarted at a slower rate.

Prevention

Prevention of Red man syndrome primarily involves the slow administration of vancomycin over at least 60 minutes. Pre-treatment with antihistamines may also be beneficial in patients who have previously experienced RMS.

See Also

• Vancomycin
• Drug eruption
• Anaphylaxis