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Urticaria Activity Scores at the start of the study (baseline) and after 5 days of treatment with levocetirizine 15 mg daily + hydroxyzine 50 mg at night (Levo + Hydroxy) or levocetirizine 20 mg daily alone (Levo Monotherapy). Horizontal bars indicate median values. Significant differences between treatments were calculated by Wilcoxon’s nonparametric test for paired data. NS, not significant.
