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  • Title: Efficacy and safety of a seven-day, transdermal estradiol drug-delivery system: comparison with conjugated estrogens and placebo. The Transdermal Estradiol Patch Study Group.
    Author: Gordon SF, Thompson KA, Ruoff GE, Imig JR, Lane PJ, Schwenker CE.
    Journal: Int J Fertil Menopausal Stud; 1995; 40(3):126-34. PubMed ID: 7663539.
    Abstract:
    OBJECTIVE: To evaluate the efficacy and safety of a new, seven-day, transdermal estradiol system in healthy postmenopausal women with hot flushes. METHODS: Two studies are described. In the first study, subjects were randomized to treatment with a 0.05 mg/day estradiol patch, a 0.1 mg/day estradiol patch, or a placebo patch; and in the second study, to treatment with either of the two estradiol patches or oral conjugated estrogens (as Premarin) 0.625 mg/day. Efficacy was evaluated on the basis of diary entries recording hot-flush frequency and severity. Subjects' and investigators' global assessments of treatment efficacy were recorded at follow-up visits. RESULTS: In Study 1, both the 0.05-mg and 0.1-mg estradiol patches were significantly more effective than placebo in reducing hot flushes and were associated with higher global assessments. In Study 2, all three active treatments produced a significant reduction in the number of hot flushes compared with base-line. There were no statistically significant between-group differences, although the response to the 0.1-mg estradiol patch was greater, and to the 0.05-mg estradiol patch less, than the response to conjugated estrogens. The patches were generally well tolerated. Skin irritation from the patch was the most common adverse experience in both studies. CONCLUSIONS: The new, seven-day, transdermal system effectively and safely treats post-menopausal vasomotor symptoms.
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