Arch Dermatol
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To describe the use of systemic therapy for psoriasis (biologic and nonbiologic [classic] drugs) in patients not adequately represented in randomized controlled trials (RCTs) and the risk of serious adverse events (SAEs) in these patients. ⋯ Patients ineligible for RCTs are an important proportion (30%) of those receiving systemic therapy for psoriasis. These patients have a higher risk of SAEs and should be closely monitored. Patients exposed to biologics (whether these patients are eligible for RCTs or ineligible) are susceptible to the same increase in risk of SAEs, but biologics add to a higher baseline risk in patients who are ineligible for RCTs. The risk-benefit ratio in ineligible patients receiving biologics might be different from the ratio in eligible patients.