Dienogest is an orally-active semisynthetic steroidal progestogen (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.
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