JAC Advance Access published online on October 14, 2004
Journal of Antimicrobial Chemotherapy, doi:10.1093/jac/dkh454
© 2004 by The British Society for Antimicrobial Chemotherapy
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1 Infectious Diseases, Huron Hospital -- Cleveland Clinic Health System, East Cleveland, OH, USA
* To whom correspondence should be addressed. E-mail: saxtell{at}cchseast.org.
Objectives: The purpose of this retrospective study was to ascertain the clinical safety of administering carbapenems, namely imipenem/cilastatin and meropenem, in patients with a history of penicillin allergy compared with administering carbapenems in patients with no reported penicillin allergy. Carbapenems are similar in chemical structure to the penicillins and therefore are associated with a risk for allergic cross-hypersensitivity. Carbapenems are commonly avoided in patients with a reported penicillin allergy on the basis of a potential cross-hypersensitivity with penicillin, however, very few studies have been conducted describing the incidence of cross-hypersensitivity between penicillin and carbapenems. Methods: A retrospective review was conducted in a total of 266 patients who were administered either imipenem/cilastatin or meropenem. The patients were admitted to the Cleveland Clinic Health System--Eastern Region Hospitals during the years 2001 and 2002. Results: Fifteen of the 163 patients (9.2%) with reported penicillin allergy developed a hypersensitivity reaction to meropenem or imipenem/cilastatin whereas 3.9% of the 103 patients without penicillin allergy developed a hypersensitivity reaction to meropenem or imipenem/cilastatin. These results are not statistically significant. Conclusions: Based on this study and other similar studies, the true incidence of cross-hypersensitivity reactions between penicillin and carbapenems may be lower than previously reported. Carbapenem use may be reasonable for penicillin allergic patients if caution is exercised.
Revised August 30, 2004
Accepted September 11, 2004
Brief Report
Is it safe to use carbapenems in patients with a history of allergy to penicillin?
2 Pharmacy, Hillcrest Hospital -- Cleveland Clinic Health System, Mayfield Heights, OH, USA
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