High Quality Content by WIKIPEDIA articles! Dienogest is an orally active synthetic progesterone (or progestin). It is available for use as an oral contraceptive in combination with ethinylestradiol. It has antiandrogenic activity and as a result can improve androgenic symptoms. It is a non-ethinylated progestin which is structurally related to testosterone. Dienogest given in isolation is available for the treatment of endometriosis under the trade name Visanne.