Levonorgestrel. Capronor . Cerazet . D-Norgestrel . Microlut . Microval . Mirena . NorLevo . Norgeston . Norplant . Norplant-2 . Plan B . Vikela . duofem . D Norgestrel . Norplant 2 . Norplant2 . l Norgestrel . l-Norgestrel . A synthetic progestational hormone with actions similar to those of PROGESTERONE and about twice as potent as its racemic or (+-)-isomer (NORGESTREL). It is used for contraception, control of menstrual disorders, and treatment of endometriosis. . 0.67