| norgestrel | <chemical> (+-)-13-ethyl-17-hydroxy-18,19-dinorpregn-4-en-20-yn-3-one. A progestational agent with actions similar to those of progesterone. This racaemic or (+-)-form has about half the potency of the levo form (levonorgestrel). Norgestrel is used as a contraceptive and ovulation inhibitor and for the control of menstrual disorders and endometriosis. Pharmacological action: contraceptives, oral, synthetic, progestational hormones, synthetic. Chemical name: 18,19-Dinorpregn-4-en-20-yn-3-one, 13-ethyl-17-hydroxy-, (17alpha)-(+-)- (12 Dec 1998) |
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| ethinyl estradiol-norgestrel combination | <chemical> Ethinyl estradiol and norgestrel given in fixed proportions. It has proved to be an effective contraceptive. Pharmacological action: contraceptives, oral, combined, contraceptives, oral, synthetic, contraceptives, postcoital, synthetic. (12 Dec 1998) |
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