The emergence of immune-modulating drugs such as biologics has altered the treatment landscape for psoriasis. However, their use presents high financial costs to patients and healthcare systems. Patient demographic and socioeconomic status may influence adherence to biologic medications and usage of healthcare resources. Areas covered: We performed a systematic literature review to summarize the available evidence pertaining to biologic medication adherence and resource use. PubMed was searched using the terms 'psoriasis and adherence' and 'psoriasis biologics resource use.' Expert commentary: Psoriasis patients utilize many healthcare resources. Adherence rates are typically higher for biologics than for other psoriasis treatment categories. However, adherence rates are still suboptimal.

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Our case highlights leukocytoclastic vasculitis as a potential side effect of the elasomeran COVID-19 vaccine. As the elasomeran vaccine becomes more widely available to the public, cutaneous reactions should be noted and looked for as potential side effects of the vaccine. Our patient had a history of immune thrombocytopenic purpura, making this a potential predisposing condition to the development of vasculitis following elasomeran administration. The case of vasculitis in our patient, although diffuse in distribution, was self-resolving. Our patient was counseled of the potential risk of worsening reaction to the second dose of the vaccine and instructed to proceed at their own risk. He elected to receive the second vaccination dose without any further reaction or side effects. Primary teaching points from this case include the potential of developing leukocytoclastic vasculitis following the elasomeran vaccination. Patients who develop LCV following the first dose should be counseled of the risks associated with receiving the second dose, including progression to systemic organ involvement.