477. Unusual tests to consider in anaphylaxis / Ddx flush syndromes + rash / Ddx stridor October 24th, 2008 by reuben in .rash, airway, allergy Back Top Tags: card 476. Who is more susceptible to transfusion reactions? / Opioids cause allergic symptoms because / Who is more susceptible to ASA allergy? / Time course of anaphylaxis / Which organ system is usually first affected? 478. Ddx bronchospasm / Anaphylaxis vs. vasovagal syncope / vs. other types of shock / Concentration of 1:1000 epinephrine in mg/ml Leave a Reply Cancel reply Please post any discussion to the emupdates Reddit page.