Tackling the Patient with Multiple Drug Allergies: Multiple Drug Intolerance Syndrome

As populations age, the prevalence of reported drug allergy increases, often leading to suboptimal care and increased morbidity because of unnecessary avoidance of safe and effective medications. Evaluation by a drug allergy specialist is often warranted when a patient has more than 2 unrelated drug allergies listed in the medical record. In this commentary, we clarify and propose standard terminology to use when evaluating patients with multiple drug allergy labels including and more specifically when diagnosing multiple drug intolerance syndrome and the much rarer multiple drug hypersensitivity syndrome. We review epidemiology and key features of multiple drug intolerance syndrome and multiple drug hypersensitivity syndrome. We summarize the methodologic and practical diagnostic workup and management of individuals with MDIS to assist with the accurate delabeling of drug allergies in the electronic health record. (C) 2020 Published by Elsevier Inc. on behalf of the American Academy of Allergy, Asthma & Immunology