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Background: Drug survival is useful to evaluate long-term drug performance in daily practice. The aim of this study was to evaluate drug survival for methotrexate (MTX) monotherapy in patients with plaque-type psoriasis., Methods: We reviewed 3,512 follow-up charts of patients with psoriasis at five tertiary referral centers between January 2012 and January 2020. We analyzed baseline data and treatment outcomes of patients under MTX monotherapy. Drug survival was analyzed using Kaplan-Meier and Cox regression analyses., Results: Patients with psoriasis who were treated with MTX monotherapy were enrolled (N = 649). The median duration of drug survival was 15 months (95% CI: 13.2-16.8). The overall drug survival rate was 54.7%, 17.4%, and 8% after 1, 3, and 5 years, respectively. The main reasons for discontinuation were adverse effects (n = 209, 32.2%) and inefficacy (n = 105, 15.6%). Based on multivariate Cox regression analysis, the presence of nausea/vomiting (HR: 2.01, 95% CI: 1.49-2.71; P < 0.001) was observed as a statistically significant risk factor for drug discontinuation. Age over 50 years (HR: 0.68, 95% CI: 0.48-0.97; P = 0.03) and using MTX dose ≥15 mg/weekly were positive predictors for drug survival (HR: 0.72, 95% CI: 0.54-0.95; P = 0.02)., Conclusions: The average drug survival of MTX was 15 months. MTX is still the first-line treatment of moderate-to-severe plaque psoriasis, as highlighted in guidelines. To prevent premature discontinuation, physicians need to look at the response time of at least 16-24 weeks, especially when a stepwise dose increment is used. The presence of nausea/vomiting seemed to be associated with an approximately twofold risk of discontinuation., (© 2021 the International Society of Dermatology.)

Acitretin is a nonimmunosuppresive systemic agent used in the treatment of psoriasis. Despite its frequent use, research on drug survival and adverse effects is limited. This study aims to evaluate drug survival, factors associated with survival, and adverse effects. Database of the six tertiary referral center for psoriasis patients treated with acitretin between November 2014 and April 2020 were retrospectively analyzed. Demographics of patients, adverse effects, and also drug survival were analyzed. Of 412 patients, 61.2% were male, and 38.8% were female. Common clinical adverse effects were cheilitis (71.4%), dry skin (62.5%), and palmoplantar skin peeling (37.2%). High triglyceride and high total cholesterol levels were observed in 50.0% and 49.5% of patients, respectively. Median survival time (95% confidence interval [CI]) was 18 (13.6-22.4) months. Statistically significant risk factors affecting drug discontinuation were having psoriatic arthritis, age under 65, and receiving previous systemic treatment. Drug survival rates were 56.6%, 25.9%, and 19.8% at 1, 5, and 8 years, respectively. Although mucocutaneous adverse effects of the acitretin were quite frequent, severe, life-treatining ones were infrequent. This old, relatively inexpensive and safe treatment remains a good alternative for the treatment of psoriasis., (© 2021 Wiley Periodicals LLC.)