Biomaterial Database

Rationale for a new triphasic oral contraceptive. 1986

S A Pasquale

Department of Obstetrics and Gynecology, UMDNJ--Robert Wood Johnson Medical School, New Brunswick.

The association of progestogen and estrogen with certain undesirable effects led investigators to seek oral contraceptive (OC) formulations containing reduced amounts of both. Evidence is presented from studies of the triphasic regimen of 0.5 mg norethindrone plus 35 micrograms ethinyl estradiol on the first seven menstrual cycle days, 0.75 mg norethindrone plus 35 micrograms ethinyl estradiol the second seven days, followed by 1 mg norethindrone plus 35 micrograms ethinyl estradiol for the final seven days. This OC formulation appears to be highly effective and relatively free of the side effects commonly associated with low-dose OC regimens.

UI	MeSH Term	Description	Entries
D008598	Menstruation	The periodic shedding of the ENDOMETRIUM and associated menstrual bleeding in the MENSTRUAL CYCLE of humans and primates. Menstruation is due to the decline in circulating PROGESTERONE, and occurs at the late LUTEAL PHASE when LUTEOLYSIS of the CORPUS LUTEUM takes place.
D008656	Mestranol	The 3-methyl ether of ETHINYL ESTRADIOL. It must be demethylated to be biologically active. It is used as the estrogen component of many combination ORAL CONTRACEPTIVES.	19-Norpregna-1,3,5(10)-trien-20-yn-17-ol, 3-methoxy-, (17alpha)-,Ethinyl Estradiol 3-Methyl Ether,Ethinyl Estradiol 3 Methyl Ether
D009640	Norethindrone	A synthetic progestational hormone with actions similar to those of PROGESTERONE but functioning as a more potent inhibitor of ovulation. It has weak estrogenic and androgenic properties. The hormone has been used in treating amenorrhea, functional uterine bleeding, endometriosis, and for CONTRACEPTION.	19-Norpregn-4-en-20-yn-3-one, 17-hydroxy-, (17alpha)-,Ethinylnortestosterone,Norethisterone,Norpregneninolone,Conceplan,Micronor,Monogest,Nor-QD,Norcolut,Norcolute,Norethindrone, (1 beta)-Isomer,Norlutin,Nor QD,NorQD
D010060	Ovulation	The discharge of an OVUM from a rupturing follicle in the OVARY.	Ovulations
D003277	Contraceptives, Oral, Combined	Fixed drug combinations administered orally for contraceptive purposes.	Combined Oral Contraceptive,Contraceptive Agents, Female, Combined,Oral Contraceptives, Combined,Combined Oral Contraceptives,Contraceptive, Combined Oral,Contraceptives, Combined Oral,Oral Contraceptive, Combined
D004334	Drug Administration Schedule	Time schedule for administration of a drug in order to achieve optimum effectiveness and convenience.	Administration Schedule, Drug,Administration Schedules, Drug,Drug Administration Schedules,Schedule, Drug Administration,Schedules, Drug Administration
D004338	Drug Combinations	Single preparations containing two or more active agents, for the purpose of their concurrent administration as a fixed dose mixture.	Drug Combination,Combination, Drug,Combinations, Drug
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man