Penicillins are the in the greatest...

Penicillins are the in the greatest degree common cause of drug-induced, IgE-mediated hypersensitivity. Cephalosporin, which is a beta-lactam antibiotic like penicillin, can cause a similar reaction. trouble about the use of cephalosporins in patients who are allergic to penicillin has alerted the use of antibiotics that do not contain a beta-lactam ring. However, this may ensue in decreased efficacy, greater splendor and increased antimicrobial resistance. Skin touchstones can be used to identify IgE anti-bodies to penicillin. Patients with positive comes are desensitized to cephalosporin or given an alternate medicine Currently, the best approach to patients with a reported history of penicillin allergy is uncertain. Romano and associates actionsed a prospective study to evaluate the use of cephalosporins in tender patients allergic to penicillin.

Skin standards for three generations of cephalosporins were applied, and challenge doses of cefuroxime (500 mg orally) or ceftriaxone (1 g intramuscularly) were administered to patients with negative skin ordeals for all of the cephalosporins touchstoneed Of the 128 patients who had a history of penicillin reaction and a positive inference on penicillin skin testing, 14 (109 percent) had a positive skin ordeal for cephalosporins. Ninety-four of the 114 (825 percent) patients who had negative skin experiments to cephalosporins agreed to a challenge with cefuroxime and ceftriaxone. Of the nine patients who had positive skin reactions to a cephalosporin, seven patients accepted the challenge doses of a cephalosporin.

None of the offer patients experienced adverse reactions after the specific cephalosporin challenges. Cephalosporin skin experiments at a concentration of 2 mg through mL seem to be reliable indicators of immediate hypersensitivity risk to cefuroxime and ceftriaxone. Of the three potential clinical options in the management of patients allergic to penicillin with compelling extremitys for cephalosporins, the authors praise skin testing with cefuroxime or ceftriaxone (see accompanying table). If the testing is negative, a graded challenge is appropriate. Medicolegal issues may arise, however, because rife practice guidelines recommend desensitization.

Romano A, et al. Cross-reactivity and tolerability of cephalosporins in patients with immediate hypersensitivity to penicillins. Ann Intern M July 6 2004;141:16-22

COPYRIGHT 2005 American Academy of Family Physicians

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