A wasp sting. Ten minutes later: flushed, wheezing, systolic 84. Anaphylaxis is a clinical diagnosis — adrenaline comes first, into the thigh, repeated early. This Atlas edition walks the whole hour as a story: recognition criteria (NIAID/FAAN), the mast-cell cascade and why 35% of plasma can leave the vessels, the dose you must say out loud (0.01 mg/kg IM, max 0.5 mg), why position is treatment, the adjuncts that come second, refractory escalation and glucagon, the biphasic clock (median 11 hours), tryptase timing, perioperative suspects, and the discharge bundle — two autoinjectors, an acti…
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