Cutaneous adverse drug reactions (CADR) collectively are delayed drug reactions such as morbilliform drug eruption (MDE) and severe cutaneous adverse reactions (SCAR). Whereas MDE may wane over time, be the result of drug viral interactions and be amenable to slow reintroduction or rechallenge, SCAR are HLA class I restricted, T-cell mediated reactions that demonstrate durable immunity and warrant lifelong avoidance. SCAR such as drug reaction with eosinophilia and systemic symptoms …