Hypersensitivity Syndrome

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Synonym(s):
DRESS, Drug Hypersensitivity Syndrome, Drug Reaction with Eosinophilia and Systemic Symptoms
A life-threatening allergic reaction to a drug. Hypersensitivity syndrome is characterized by fever, rash, organ involvement (most frequently the liver), and high blood levels of eosinophils (a type of white blood cell). Use of certain antiretroviral (ARV) drugs may cause hypersensitivity syndrome.

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