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Tri-Norinyl (Norethindrone / Ethinyl Estradiol / Norethindrone / Ethinyl Estradiol) - Summary



Tri-Norinyl ®
(Norethindrone and Ethinyl Estradiol Tablets USP)
Rx only

Tri-Norinyl ® provides a continuous oral contraceptive regimen of 7 blue tablets, 9 yellow-green tablets, 5 more blue tablets, and then 7 orange tablets. Each blue tablet contains norethindrone 0.5 mg and ethinyl estradiol 0.035 mg, each yellow-green tablet contains norethindrone 1 mg and ethinyl estradiol 0.035 mg, and each orange tablet contains inert ingredients. Norethindrone is a potent progestational agent with the chemical name 17-Hydroxy-19-nor-17α-pregn-4-en-20-yn-3-one. Ethinyl estradiol is an estrogen with the chemical name 19-Nor-17α-pregna-1,3,5 (10)-trien-20-yne-3,17-diol.

Oral contraceptives are indicated for the prevention of pregnancy in women who elect to use this product as a method of contraception.

Oral contraceptive products such as Norinyl, which contain 50 mcg of estrogen, should not be used unless medically indicated.

See all Tri-Norinyl indications & dosage >>


Media Articles Related to Tri-Norinyl (Norethindrone / Estradiol / Norethindrone / Estradiol)

Improved access to female-controlled contraception is needed to help women experiencing intimate partner violence
Source: Sexual Health / STDs News From Medical News Today [2014.09.17]
Access to female-controlled contraceptive methods must be improved in order to help women and girls to counteract any risks to their reproductive health caused by intimate partner violence and...

Research reveals more than half of young women who have abortions were using contraception when they fell pregnant
Source: Abortion News From Medical News Today [2014.04.30]
Reproductive health charity Marie Stopes UK has launched the findings of the first research in the UK into the contraceptive use of women aged 16-24 having one or more abortions.

Long-Acting Contraceptives Still Often Not Free for Women
Source: MedPage Today OB/Gyn [2014.10.12]
(MedPage Today) -- ACA's promise of free contraception still often unfulfilled.

PodMed: A Medical News Roundup From Johns Hopkins (with audio)
Source: MedPage Today Gastroenterology [2014.10.04]
(MedPage Today) -- This weeks topics include the impact of contraception on teen pregnancy, mechanical versus tissue heart valves, acupuncture for knee pain, and early gluten introduction and celiac disease.

Free birth control reduces teen pregnancies and abortions
Source: Abortion News From Medical News Today [2014.10.03]
Teens who received free contraception and were educated about the pros and cons of various birth control methods were dramatically less likely to get pregnant, give birth or get an abortion compared...

more news >>

Published Studies Related to Tri-Norinyl (Norethindrone / Estradiol / Norethindrone / Estradiol)

Combined continuous ethinyl estradiol/norethindrone acetate does not improve forearm blood flow in postmenopausal women at risk for cardiovascular events: a pilot study. [2007.09]
OBJECTIVE: This study sought to determine whether combined continuous ethinyl estradiol and norethindrone acetate, a postmenopausal hormone therapy (HT) combination designed to have fewer side effects than cyclical therapies and therapies using medroxyprogesterone acetate (MPA), could improve vascular endothelial function in postmenopausal women with risk factors for cardiovascular disease (CVD)... CONCLUSIONS: In this older postmenopausal population with at least one cardiovascular risk factor, treatment with combined continuous ethinyl estradiol and norethindrone acetate failed to improve vascular endothelial function. The agent's proinflammatory effect or subclinical atherosclerosis in this population may have contributed to this finding.

Cycle control, tolerability, and satisfaction among women switching from 30-35 microg ethinyl estradiol-containing oral contraceptives to the triphasic norgestimate/25 microg ethinyl estradiol-containing oral contraceptive Ortho Tri-Cyclen LO. [2003.07]
OBJECTIVE: To determine cycle control, tolerability, and satisfaction among women (aged 18-45) switching from oral contraceptives (OCs) containing 30-35 microg ethinyl estradiol (EE) to Ortho Tri-Cyclen LO (norgestimate 180/215/250 microg/EE 25 microg) and Loestrin Fe 1/20 (norethindrone acetate 1 mg/EE 20 microg)...

Comparison of a novel norgestimate/ethinyl estradiol oral contraceptive (Ortho Tri-Cyclen Lo) with the oral contraceptive Loestrin Fe 1/20. [2001.06]
This multicenter study compared the contraceptive efficacy, cycle control, and safety of a new triphasic norgestimate (180/215/250 microg)/ethinyl estradiol 25 microg regimen (Ortho Tri-Cyclen Lo) (n = 1,723) with that of norethindrone acetate 1 mg/ethinyl estradiol 20 microg (Loestrin Fe 1/20) (n = 1,171)...

Comparative clinical evaluation of the effect on carbohydrate and lipid metabolism of two norethisterone-containing hormonal contraceptives: Mesigyna and TriNovum. [1997.05]
The effect on carbohydrate and lipid metabolism of two hormonal contraceptive preparations containing norethisterone (commercially known as Mesigyna and TriNovum) was studied in a total of 60 women, before and after 6 months of treatment. Carbohydrate metabolism was evaluated by means of a euglycemic glucose clamp test; lipid metabolism was monitored by measuring total cholesterol, HDL-cholesterol, LDL-cholesterol, VLDL-cholesterol, and triglycerides...

A triphasic oral contraceptive pill, CTR-05: clinical efficacy and safety. [1996.09]
CONCLUSION: Desogestrel, with little estrogenic activity and only minimal androgenic activity, leads to lipoprotein changes, resulting in a favorable cardiovascular profile, as well as minimal androgen-related effects, such as hirsutism and acne.

more studies >>

Clinical Trials Related to Tri-Norinyl (Norethindrone / Estradiol / Norethindrone / Estradiol)

Study of Loestrin 24(24 Days of "Real" Pills) Fe Versus Loestrin 1/20 (21 "Real" Pills) [Active, not recruiting]
The purpose of this research study is to assess hormone withdrawal symptoms in women while taking an oral contraceptive in the novel 24/4 (24 days of "real" pills) manner in comparison to taking pills in the standard 21/7 (21 "real" pills) manner.

It is hypothesized that the 24/4 method will reduce common hormone withdrawal symptoms compared to the standard 21/7 regimen.

It is further hypothesized that women using the 24/4 regimen will report greater satisfaction scores.

A Study in Healthy Female Participants Investigating the Effect of TMC435 on the Pharmacokinetics of the Synthetic Hormones of the Oral Contraceptive Ovysmen [Recruiting]
The purpose of this study is to investigate the effect of steady-state concentrations of TMC435 (administered once a day) on the steady-state pharmacokinetics of ethinylestradiol and norethindrone (administered once a day) and on the levels of progesterone, luteinizing hormone and follicle-stimulating hormone, in healthy female participants. Ethinlyestradiol and norethindrone are synthetic hormones, which constitute the oral contraceptive Ovysmen. Also the short-term safety and tolerability of the co-administration of TMC435 and Ovysmen will be studied. Steady-state is a term that means that the drug has been given long enough so that the plasma concentrations will remain the same with each subsequent dose. TMC435 is being investigated for the treatment of chronic hepatitis C virus (HCV) infection. Pharmacokinetics (PK) means how the drug is absorbed into the bloodstream, distributed in the body and eliminated from the body. A contraceptive is a method that prevents pregnancy.

Oral Contraceptive (OC) Estrogen Dose and Breast Proliferation [Recruiting]
The purpose of this research study is to gain a better understanding of the changes that may occur in the breast when a woman uses an oral contraceptive (birth control pill). Some research indicates that women who use birth control pills with lower amounts of estrogen (a hormone in the birth control pill) may have lower breast cell growth than women who use birth control pills with a higher amount of estrogen; this research will examine that in detail. This research will also test whether the results found in HS-07-00269 can be confirmed.

TMC278-TiDP6-C136: Effect of TMC278 on Ethinylestradiol and Norethindrone in Healthy Women. [Recruiting]
The purpose of this study is to investigate the pharmacokinetic interaction between the combination of ethinylestradiol and norethindrone and TMC278 25 mg once daily. Pharmacokinetics means how the drug is absorbed into the bloodstream, distributed in the body and eliminated from the body. Furthermore the short-term safety and tolerability (how well the body tolerates the drug) of co-administration of TMC278 and ethinylestradiol and norethindrone, in healthy women, will be assessed.

Randomized Trial of Induction Therapies in High Immunological Risk Kidney Transplant Recipients [Recruiting]
The purpose of this research study is to find out the effects of adding B lymphocyte modulating agents in patients at risk for rejection receiving an anti-rejection (immunosuppressive) regimen of Thymoglobulin® induction with Prograf®, Cellcept® and corticosteroid therapy.

more trials >>

Page last updated: 2014-10-12

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