Case 1: Abacavir Hypersensitivity Reaction

Question | Discussion | References | CME Credit

You answered:

	Rash alone is sufficient to diagnose abacavir hypersensitivity, and abacavir should have been stopped with the initial onset of the rash.

This answer is incorrect. Isolated rash occurs in approximately 10% of patients receiving abacavir without being associated with a hypersensitivity reaction. In this case, it was more likely that his rash was caused by trimethoprim-sulfamethoxazole.

Choose another answer:

	The onset of symptoms three weeks after initiating antiretroviral therapy makes abacavir hypersensitivity unlikely because the hypersensitivity reaction is usually characterized by an immediate-type reaction occurring within 12 hours of taking the initial dose of abacavir.
	The presence of multiple organ system involvement increases the likelihood that abacavir hypersensitivity is occurring in this individual.
	This patient is experiencing an abacavir hypersensitivity reaction and should receive therapy with corticosteroids.
	This patient should be diagnosed with abacavir hypersensitivity reaction and should have his medication discontinued. Once his symptoms have resolved, it is safe to rechallenge the patient with a lower dose of abacavir.

[Back to Case 1 Question | Go to Correct Answer]