What makes a dermatologic drug reaction more severe?

• A. Fever
• B. Pruritus only
• C. Rash without systemic symptoms
• D. Age over 60

Answer: (A)

Fever signals that the body's immune response is affecting more than just the skin, indicating a systemic and thus more severe reaction. When a drug eruption is accompanied by fever, there is a higher risk of progression to a serious cutaneous adverse reaction such as DRESS or progression toward erythema multiforme major or SJS/TEN, with potential involvement of liver, kidneys, or blood. This is why stopping the offending drug and closely evaluating for organ involvement and systemic signs is essential. In contrast, pruritus alone points to a milder exanthem, and a rash without systemic symptoms is typically less severe. Age over 60 can worsen outcomes in some drug reactions but does not by itself define current severity; fever is the clearest indicator of systemic involvement.