RT Journal Article SR Electronic T1 Methotrexate in Psoriasis and Psoriatic Arthritis JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 31 OP 35 DO 10.3899/jrheum.200124 VO 96 A1 Laura C. Coates A1 Joseph F. Merola A1 Suzanne M. Grieb A1 Philip J. Mease A1 Kristina Callis Duffin YR 2020 UL http://www.jrheum.org/content/96/31.abstract AB Methotrexate (MTX) is the most commonly prescribed first-line therapy in psoriatic arthritis (PsA) internationally and is also commonly used in the treatment of psoriasis. However, data supporting its use in PsA are limited and significant toxicities can occur. This article summarizes a debate at the 2019 Group for Research and Assessment of Psoriasis and Psoriatic Arthritis (GRAPPA) annual meeting that focused on the use of MTX in psoriasis and PsA. Four clinicians and 1 patient research partner presented clinical study data and the patient experience summarizing the efficacy, tolerability, and toxicity of MTX for both skin and musculoskeletal manifestations. A survey of attending GRAPPA members collected data on current and planned future use of MTX across the world.