Ogen

Estropipate, also known as piperazine estrone sulfate and sold under the brand names Harmogen, Improvera, Ogen, Ortho-Est, and Sulestrex among others, is an estrogen medication which is used mainly in menopausal hormone therapy in the treatment of menopausal symptoms. It is a salt of estrone sulfate and piperazine, and is transformed into estrone and estradiol in the body. It is taken by mouth.