Estrogen patch
（重定向自Esclim）
The estrogen patch (oestrogen patch) is a delivery system for estradiol, which is used as hormone replacement therapy to treat the problems of menopause, such as hot flashes and vaginal dryness, or to prevent osteoporosis. They are also used in hormone replacement therapy for male to female transgender people. The estrogen is given transdermally rather than via oral tablets, meaning that the estrogen patch carries similar risks and benefits that conventional forms of estrogen-only hormone replacement therapy have, but there are also important differences.