Immediate hypersensitivity to aztreonam and imipenem.

Imipenem in patients with immediate hypersensitivity to penicillins.

Immediate hypersensitivity and delayed hypersensitivity to clopidogrel.

Clopidogrel is a new antiplatelet prescribed for the secondary prevention of atherosclerotic events. The literature shows that the clinical manifestations of clopidogrel hypersensitivity include urticaria1, skin rash2-4, and angioedema5. The precise immunological mechanism underlying clopidogrel hypersensitivity has not been established. We describe two cases of hypersensitivity reaction due to...

Immediate hypersensitivity to corticosteroids.

INTRODUCTION In comparison with the extremely frequent use of corticosteroids in different diseases, immediate allergic reactions remain uncommon. In addition to the steroid molecule, the causative agent of these reactions can be an excipient. MATERIAL AND METHODS We report seven cases of immediate reactions induced by different preparations of corticosteroids. Skin tests with the suspected s...

Selective immediate hypersensitivity to cefepime.

Cefepime is a fourth-generation cephalosporin with a broad antimicrobial spectrum and good activity against both gram-positive and gram-negative organisms. We present the case of a 61-year-old man who developed an immediate urticarial reaction after receiving a single dose of cefepime. Skin tests were positive to cefepime and negative to the other beta-lactam antibiotics. Controlled administrat...

Allergic Immediate Hypersensitivity to Iodinated Contrast Media

Background: Immediate hypersensitivity reactions (IHR) to iodinated contrast media (ICM) have traditionally been considered nonallergic; however, the increasingly frequent reporting of positive skin test and basophil activation test results suggests a specifi c allergic mechanism in some patients. Skin tests have been proposed as a useful tool for diagnosis, although their sensitivity and predi...