Effectiveness of Subcutaneous Methotrexate in Chronic Plaque Psoriasis
March 2016 | Volume 15 | Issue 3 | Original Article | 345 | Copyright © March 2016
Paul Devakar Yesudian MRCP,a Joyce Leman FRCP,b Periasamy Balasubramaniam MRCP,a
Andy W. Macfarlane FRCP,a Firas Al-Niaimi MRCP,c Christopher E. M. Griffiths FRCP MD FMedSci,c
Arthur David Burden MD,b and Richard B. Warren FRCP PhDc
aBetsi Cadwaladr University Health Board, Bodelwyddan, UK
bWestern Infirmary, Glasgow, UK
cDermatology Centre, Salford Royal Hospital NHS Foundation Trust, The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
METHODS: We retrospectively reviewed case notes of 85 patients prescribed SC MTX for psoriasis in three dermatology centres in the UK (Betsi Cadwaladr University Health Board, Western Infirmary, Glasgow, and Salford Royal NHS Foundation Trust). Audit department approval was sought and granted.
RESULTS: A total of 85 patients (44 male; 41 female; age range 14 – 78 years, mean 44 years; 79 Caucasian, 6 Asian) with CPP were identified. The average duration of psoriasis was 19 years [range 3 - 60 years]. Co-morbidities included depression, diabetes mellitus, hypertension, epilepsy, obesity, ischaemic heart disease, and hyperlipidaemia; 29 patients had no associated co-morbidities. Psoriatic arthritis was noted in 18 patients.
Previous treatments included phototherapy (both narrow band ultraviolet B [TLO1] and psoralen and ultraviolet A [PUVA])(n=60), oral MTX (n=82), ciclosporin (n=37), acitretin (n=19), fumaric acid esters (n=20), hydroxycarbamide (n=6), mycophenolate mofetil (n=2), and repeated in-patient admissions (n=2). Oral MTX was stopped due to nausea (n=43), ineffectiveness (n=13) or partial response (n=11), headache (n=3), increased liver enzymes (n=2), and lethargy (n=2). The median number of systemic agents used prior to SC MTX was 3 (mean 2.65, range 1 to 6 agents). The weekly dose of SC MTX varied between 7.5mg to 30mg (mean 18.5mg, median 20mg) and had been used for 2 months to 67 months (mean 14 months; median 9 months). Folic acid supplementation was used in every patient. The patients were reviewed between 6 weeks to 3 months once treatment was fully established. Using a pre-determined “adjective list” (where specific adjectives were used to denote those who responded or did not respond to treatment), patients were classified as “responders” (n=59) or “non-responders” (n=26).
CONCLUSION: This study suggests that SC MTX is an effective option in patients with CPP who have failed oral MTX and could be a worthwhile consideration prior to commencement of a biologic agent. Furthermore, the SC route may be a viable first choice of MTX administration. A randomised controlled trial comparing oral and SC MTX is required to validate these findings.
J Drugs Dermatol. 2016;15(3):345-349.