Drosperinone is the progesterone in Loryna. Loryna has BOTH drosperinone (progesterone) and ethinyl estradiol (estrogen). Birth control pills usually contain BOTH an estrogen and a progesterone. And there are lots of different generic birth control with the same active ingredients at the same doses – for example Loryna = Yaz (lower dose estrogen though), Yasmin, Gianvi, Loryna, Ocella, Syeda, Vestura, Zarah.