The aim of this trial was to assess the relative patient acceptability of two transdermal oestradiol patches used in treatment of oestrogen deficiency in postmenopausal women. Thirty-five hysterectomised postmenopausal women with no previous experience of transdermal oestradiol delivery systems received treatment with either once-weekly drug-in-adhesive (DIA) patches or twice-weekly reservoir patches for 4 weeks, and were then switched to the alternative treatment for a further 4 weeks. At the end of the study, the patients completed a questionnaire to assess their relative preference for a number of characteristics of the 2 transdermal systems and, where possible, their preference for transdermal compared with oral hormone replacement therapy. Thirty-one patients completed the study; four withdrew during treatment with the reservoir patch. The DIA patch was preferred for being 'easiest to remember to apply' by 80% of patients (p < 0.01), 'easiest to open' and 'easiest to apply' by 68% (p = 0.025), and as having 'best cosmetic appearance' by 65% (p = 0.05) and 'best overall skin adhesion' by 61% (p < 0.01). While 10% of patients rated the reservoir patch as 'least irritating to the skin' (p = 0.03), only one patient found this patch 'most comfortable to wear' (p < 0.01). The DIA patch was selected by 87% of patients as their preferred treatment overall (p = 0.001). Ninety-one per cent of 22 responding patients were at least as confident of treatment with transdermal patches as with oral hormone replacement therapy (p = 0.006) and 74 % of 27 responders preferred transdermal to oral treatment (p = 0.004). The DIA patch appears to be more acceptable to patients than the reservoir patch as a transdermal oestradiol delivery system for the treatment of postmenopausal oestrogen deficiency. Characteristics of the DIA patch which may account for improved patient acceptance include ease of remembering once-weekly patch application, improved cosmetic appearance and comfort, and better adhesion.
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