Levonorgestrel

Pronunciation

Definition 1

A form of the hormone progesterone that is made in the laboratory and used to prevent pregnancy. It is being studied in the prevention of ovarian and endometrial cancer, and in the treatment of other conditions. Levonorgestrel is a type of oral contraceptive. Also called L-norgestrel and Plan B. (NCI Dictionary)

Definition 2

The levorotatory form of norgestrel and synthetic progestogen with progestational and androgenic activity. Levonorgestrel binds to the progesterone receptor in the nucleus of target cells, thereby stimulating the resulting hormone-receptor complex, initiating transcription, and increasing the synthesis of certain proteins. This results in a suppression of luteinizing hormone (LH) activity and an inhibition of ovulation, as well as an alteration in the cervical mucus and endometrium. (NCI Thesaurus)

YOU MAY ALSO LIKE

Levonordefrin Hydrochloride

The hydrochloride salt of levonordefrin, a synthetic catecholamine and norepinephrine derivative with sympathomimetic and antihypertensive effects. Levonordefrin's antihypertensive effect is exerted through…

Levonordefrin

The levoisomer of nordefrin, a synthetic catecholamine and norepinephrine derivative with sympathomimetic and antihypertensive effects. Levonordefrin's antihypertensive effect is exerted through activation…

Levonantradol

A synthetic cannabinoid analogue of delta (9)-tetrahydrocannabinol (delta(9)-THC) with antiemetic and anti-analgesic properties. Although its precise mechanism of action is unknown, levonantradol…

Levomethadyl Acetate Hydrochloride

The hydrochloride salt form of levomethadyl acetate, a synthetic mu-receptor agonist with analgesic activity. Levomethadyl acetate hydrochloride mimics the actions of endogenous…

Levomenthol

A levo isomer of menthol, an organic compound made synthetically or obtained from peppermint or mint oils with flavoring and local anesthetic…

Levoleucovorin Calcium

A levo isoform of leucovorin calcium with antineoplastic activity. Levoleucovorin is an active metabolite of folic acid, which does not require metabolism…