Drug Summary

  Drug name:  levonorgestrel
  Chemical name:  Norgestrel-(-)-D
  Formula:  C₂₁H₂₈O₂
  Weight:   312.4458
  CAS no:  797-63-7
  DrugBank link:  DB00367
  Description:  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. It is usually supplied in a racemic mixture (Norgestrel, 6533-00-2). Only the levonorgestrel isomer is active. Levonorgestrel is marketed mostly as a combination oral contraceptive under several brand names such as Alesse, Triphasil, and Min-Ovral.
  Indication:  For the treatment of menopausal and postmenopausal disorders and alone or in combination with other hormones as an oral contraceptive.