Double‐blind, multicenter controlled trial comparing topical dimethyl sulfoxide and normal saline for treatment of hand ulcers in patients with systemic sclerosis

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Abstract
A prospective, randomized, double‐blind trial compared topical therapy with 0.85% normal saline, 2% dimethyl sulfoxide (DMSO), and 70% DMSO for treatment of digital ulcers in 84 patients with systemic sclerosis. There were no statistically significant differences among the 3 treatment groups in the improvement in the total number of open ulcers, total surface area of open ulcers, average surface area per open ulcer, number of infected ulcers, number of inflamed ulcers, or patient pain assessment. While some patients improved during the study, improvement could not be attributed to a specific treatment. Over one‐quarter of the patients treated with 70% DMSO were withdrawn for significant skin toxicity.