Revista alergia Mexico (Tecamachalco, Puebla, Mexico : 1993) · 2017
[Delayed allergic reaction to amlodipine with a positive lymphocyte transformation test].
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Monge-Ortega Olga Patricia, Domínguez-Ortega Javier, González-Muñoz Miguel, Cabañas Rosario, Lluch-Bernal Magdalena, Fiandor Ana, Bravo-Gallego Luz Yadira, Quirce Santiago
Аннотация
BACKGROUND: Amlodipine is one of the third generation dihydropyridine calcium channel blockers used for hypertension. Mild, moderate and severe reactions have been reported with calcium channel blockers. Cross-reactivity among these drugs has not been established.
CLINICAL REPORT: We have presented the case of a patient who developed a delayed pruritic, and erythematous maculopapular skin exanthema after the intake of amlodipine. A positive lymphocyte transformation test (LTT) confirmed the implication of amlodipine in the reaction and showed positivity to another calcium channel blocker, nifedipine, demonstrating cross reactivity.
CONCLUSION: This is the first reported case of hypersensitivity to amlodipine in which the involvement of the drug is confirmed by a positive TTL. TTL could become a good diagnostic alternative for patients who experience late reactions to amlodipine and possibly cross-reactivity with nifedipine.
CLINICAL REPORT: We have presented the case of a patient who developed a delayed pruritic, and erythematous maculopapular skin exanthema after the intake of amlodipine. A positive lymphocyte transformation test (LTT) confirmed the implication of amlodipine in the reaction and showed positivity to another calcium channel blocker, nifedipine, demonstrating cross reactivity.
CONCLUSION: This is the first reported case of hypersensitivity to amlodipine in which the involvement of the drug is confirmed by a positive TTL. TTL could become a good diagnostic alternative for patients who experience late reactions to amlodipine and possibly cross-reactivity with nifedipine.