NDC 16571-658 Norethindrone Acetate

Norethindrone Acetate

NDC Product Code 16571-658

NDC CODE: 16571-658

Proprietary Name: Norethindrone Acetate What is the Proprietary Name?
The proprietary name also known as the trade name is the name of the product chosen by the medication labeler for marketing purposes.

Non-Proprietary Name: Norethindrone Acetate What is the Non-Proprietary Name?
The non-proprietary name is sometimes called the generic name. The generic name usually includes the active ingredient(s) of the product.

Drug Use Information

Drug Use Information
The drug use information is a summary and does NOT have all possible information about this product. This information does not assure that this product is safe, effective, or appropriate. This information is not individual medical advice and does not substitute for the advice of a health care professional. Always ask a health care professional for complete information about this product and your specific health needs.

  • This medication is used to treat women with abnormal bleeding from the uterus. It is also used to treat women who have stopped having menstrual periods for several months (amenorrhea) but who are not pregnant or going through menopause. In addition, this medication is used to treat a condition (endometriosis) in which tissue that normally lines the inside of the uterus is found outside the uterus in the abdomen/pelvic area, causing painful/irregular periods. Norethindrone is a type of female hormone (progestin). It is like the hormone progesterone that your body makes naturally. This medication works by stopping the normal growth of the uterus lining during the menstrual cycle and signaling hormone changes in the uterus to restore normal menstrual periods. This medication must not be used to test for pregnancy. Progestins are not effective in preventing miscarriages.

Product Characteristics

Shape: OVAL (C48345)
11 MM
Score: 2

NDC Code Structure

NDC 16571-658-05

Package Description: 50 TABLET in 1 BOTTLE

NDC 16571-658-50

Package Description: 500 TABLET in 1 BOTTLE

NDC Product Information

Norethindrone Acetate with NDC 16571-658 is a a human prescription drug product labeled by Rising Pharmaceuticals, Inc.. The generic name of Norethindrone Acetate is norethindrone acetate. The product's dosage form is tablet and is administered via oral form. The RxNorm Crosswalk for this NDC code indicates a single RxCUI concept is associated to this product: 1000405.

Dosage Form: Tablet - A solid dosage form containing medicinal substances with or without suitable diluents.

Product Type: Human Prescription Drug What kind of product is this?
Indicates the type of product, such as Human Prescription Drug or Human Over the Counter Drug. This data element matches the “Document Type” field of the Structured Product Listing.

Norethindrone Acetate Active Ingredient(s)

What is the Active Ingredient(s) List?
This is the active ingredient list. Each ingredient name is the preferred term of the UNII code submitted.

Inactive Ingredient(s)

About the Inactive Ingredient(s)
The inactive ingredients are all the component of a medicinal product OTHER than the active ingredient(s). The acronym "UNII" stands for “Unique Ingredient Identifier” and is used to identify each inactive ingredient present in a product.


Administration Route(s)

What are the Administration Route(s)?
The translation of the route code submitted by the firm, indicating route of administration.

  • Oral - Administration to or by way of the mouth.

Pharmacological Class(es)

What is a Pharmacological Class?
These are the reported pharmacological class categories corresponding to the SubstanceNames listed above.

  • Progesterone Congeners - [CS]
  • Progestin - [EPC] (Established Pharmacologic Class)

Product Labeler Information

What is the Labeler Name?
Name of Company corresponding to the labeler code segment of the Product NDC.

Labeler Name: Rising Pharmaceuticals, Inc.
Labeler Code: 16571
FDA Application Number: ANDA206490 What is the FDA Application Number?
This corresponds to the NDA, ANDA, or BLA number reported by the labeler for products which have the corresponding Marketing Category designated. If the designated Marketing Category is OTC Monograph Final or OTC Monograph Not Final, then the Application number will be the CFR citation corresponding to the appropriate Monograph (e.g. “part 341”). For unapproved drugs, this field will be null.

Marketing Category: ANDA - A product marketed under an approved Abbreviated New Drug Application. What is the Marketing Category?
Product types are broken down into several potential Marketing Categories, such as NDA/ANDA/BLA, OTC Monograph, or Unapproved Drug. One and only one Marketing Category may be chosen for a product, not all marketing categories are available to all product types. Currently, only final marketed product categories are included. The complete list of codes and translations can be found at www.fda.gov/edrls under Structured Product Labeling Resources.

Start Marketing Date: 11-05-2018 What is the Start Marketing Date?
This is the date that the labeler indicates was the start of its marketing of the drug product.

Listing Expiration Date: 12-31-2021 What is the Listing Expiration Date?
This is the date when the listing record will expire if not updated or certified by the product labeler.

Exclude Flag: N - NO What is the NDC Exclude Flag?
This field indicates whether the product has been removed/excluded from the NDC Directory for failure to respond to FDA"s requests for correction to deficient or non-compliant submissions ("Y"), or because the listing certification is expired ("E"), or because the listing data was inactivated by FDA ("I"). Values = "Y", "N", "E", or "I".

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Information for Patients


Norethindrone is pronounced as (nor eth in' drone)

Why is norethindrone medication prescribed?
Norethindrone is used to treat endometriosis, a condition in which the type of tissue that lines the uterus (womb) grows in other areas of the body and causes pain, heavy...
[Read More]
Progestin-Only Oral Contraceptives

Progestin-Only Oral Contraceptives is pronounced as (pro jes' tin)
Why is progestin-only oral contraceptives medication prescribed?
Progestin-only oral contraceptives are used to prevent pregnancy. Progestin is a female hormone. It works by preventing the release of eggs from the ovaries (ovulation) a...
[Read More]

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Norethindrone Acetate Product Labeling Information

The product labeling information includes all published material associated to a drug. Product labeling documents include information like generic names, active ingredients, ingredient strength dosage, routes of administration, appearance, usage, warnings, inactive ingredients, etc.

Product Labeling Index


Norethindrone acetate tablets, USP - 5 mg oral tablets. Norethindrone acetate tablets, (17-hydroxy-19-nor-17α-pregn-4-en-20-yn-3-one acetate), a synthetic, orally active progestin, is the acetic acid ester of norethindrone. It is a white to yellowish-white, crystalline powder. Norethindrone acetate tablets contain the following inactive ingredients: lactose monohydrate, magnesium stearate, and microcrystalline cellulose. Meets USP Dissolution Test 2.

Clinical Pharmacology

Norethindrone acetate induces secretory changes in an estrogen-primed endometrium. On a weight basis, it is twice as potent as norethindrone.


Absorption: Norethindrone acetate is completely and rapidly deacetylated to norethindrone (NET) after oral administration, and the disposition of norethindrone acetate is indistinguishable from that of orally administered norethindrone. Norethindrone acetate is rapidly absorbed from norethindrone acetate tablets, with maximum plasma concentration of norethindrone generally occurring at about 2 hours post-dose. The pharmacokinetic parameters of norethindrone following single oral administration of norethindrone acetate tablets in 29 healthy female volunteers are summarized in Table 1.Table 1Pharmacokinetic Parameters after a Single Dose of norethindrone acetate tablets in Healthy WomenNorethindrone acetate tablets (n=29) Arithmetic Mean ± SDNorethindrone (NET)AUC (0-inf)(ng/mL*h)166.90±56.28Cmax (ng/mL)26.19±6.19tmax (h)1.83±0.58T1/2 (h)8.51±2.19AUC = area under the curveCmax = maximum plasma concentrationtmax = time at maximum plasma concentrationt1/2 = half-lifeSD = standard deviationFigure 1. Mean Plasma Concentration Profile after a Single Dose of 5 mg Administered to 29 Healthy Female Volunteers under Fasting Conditions  Effect of Food: The effect of food administration on the pharmacokinetics of norethindrone acetate tablets has not been studied. Distribution: Norethindrone is 36% bound to sex hormone-binding globulin (SHBG) and 61% bound to albumin. Volume of distribution of norethindrone is about 4 L/kg.Metabolism: Norethindrone undergoes extensive biotransformation, primarily via reduction, followed by sulfate and glucuronide conjugation. The majority of metabolites in the circulation are sulfates, with glucuronides accounting for most of the urinary metabolites.Excretion: Plasma clearance value for norethindrone is approximately 0.4 L/hr/kg. Norethindrone is excreted in both urine and feces, primarily as metabolites. The mean terminal elimination half-life of norethindrone following a single dose  administration of norethindrone acetate tablets is approximately 9 hours.

Special Populations

Geriatrics The effect of age on the pharmacokinetics of norethindrone after norethindrone acetate tablets administration has not been evaluated.Race The effect of race on the disposition of norethindrone after norethindrone acetate tablets administration has not been evaluated.Renal Insufficiency The effect of renal disease on the disposition of norethindrone after norethindrone acetate tablets administration has not been evaluated. In premenopausal women with chronic renal failure undergoing peritoneal dialysis who received multiple doses of an oral contraceptive containing ethinyl estradiol and norethindrone, plasma norethindrone concentration was unchanged compared to concentrations in premenopausal women with normal renal function.Hepatic Insufficiency The effect of hepatic disease on the disposition of norethindrone after norethindrone acetate tablets administration has not been evaluated. However, norethindrone acetate tablets are contraindicated in markedly impaired liver function or liver disease.Drug Interactions No pharmacokinetic drug interaction studies investigating any drug-drug interactions with norethindrone acetate tablets have been conducted.

Indications And Usage

Norethindrone acetate tablets are indicated for the treatment of secondary amenorrhea, endometriosis, and  abnormal uterine bleeding due to hormonal imbalance in the absence of organic pathology, such as submucous fibroids or uterine cancer. Norethindrone acetate tablets are not intended, recommended or approved to be used with concomitant estrogen therapy in postmenopausal women for endometrial protection.


• Known or suspected pregnancy. There is no indication for norethindrone acetate tablets in pregnancy. (See PRECAUTIONS.) • Undiagnosed vaginal bleeding • Known, suspected or history of cancer of the breast • Active deep vein thrombosis, pulmonary embolism or history of these conditions • Active or recent (e.g., within the past year) arterial thromboembolic disease (e.g., stroke, myocardial  infarction) • Impaired liver function or liver disease • As a diagnostic test for pregnancy • Hypersensitivity to any of the drug components


1   Cardiovascular disorders       Patients with risk factors for arterial vascular disease (e.g., hypertension, diabetes mellitus, tobacco use,    hypercholesterolemia, and obesity) and/or venous thromboembolism (e.g., personal history or family history of VTE, obesity, and systemic lupus erythematosus) should be managed appropriately.2    Visual abnormalities       Discontinue medication pending examination if there is a sudden partial or complete loss of vision or if there is sudden onset of proptosis, diplopia, or migraine. If examination reveals papilledema or retinal vascular lesions, medication should be discontinued.

1  General Precautions

•   Because this drug may cause some degree of fluid retention, conditions which might be influenced by this factor, such as epilepsy, migraine, cardiac or renal dysfunctions, require careful observation •   In cases of breakthrough bleeding, and in all cases of irregular bleeding per vagina, nonfunctional causes should be borne in mind. In cases of undiagnosed vaginal bleeding, adequate diagnostic measures are indicated •   Patients who have a history of clinical depression should be carefully observed and the drug discontinued if the depression recurs to a serious degree •   Data suggest that progestin therapy may have adverse effects on lipid and carbohydrate metabolism. The choice of progestin, its dose, and its regimen may be important in minimizing these adverse effects, but these issues will require further study before they are clarified. Women with hyperlipidemias and/or   diabetes should be monitored closely during progestin therapy •   The pathologist should be advised of progestin therapy when relevant specimens are submitted

2  Information For The Patient

Healthcare providers are advised to discuss the PATIENT INFORMATION leaflet with patients for whom they prescribe norethindrone acetate tablets.

3  Drug/Laboratory Tests Interactions

The following laboratory test results may be altered by the use of estrogen/progestin combination drugs:1  Accelerated prothrombin time, partial thromboplastin time, and platelet aggregation time; increased platelet count; increased factors II, VII antigen, VIII antigen, VIII coagulant activity, IX, X, XII, VII-X complex, II-VII-X complex, and beta-thromboglobulin; decreased levels of antifactor Xa and antithrombin III,   decreased antithrombin III activity; increased levels of fibrinogen and fibrinogen activity; increased plasmino- gen antigen and activity. 2  Increased thyroid-binding globulin (TBG) levels leading to increased circulating total thyroid hormone levels as measured by protein-bound iodine (PBI), T4 levels (by column or by radioimmunoassay) or T3 levels by radio immunoassay. T3 resin uptake is decreased, reflecting the elevated TBG. Free T4 and free T3 concentrations are unaltered. Patients on thyroid replacement therapy may require higher doses of thyroid hormone. 3  Other binding proteins may be elevated in serum (i.e., corticosteroid binding globulin (CBG), sex hormone binding globulin (SHBG)) leading to increased circulating corticosteroid and sex steroids, respectively. Free or biologically active hormone concentrations are unchanged. Other plasma proteins may be increased (angiotensinogen/renin substrate, alpha-1-antitrypsin, ceruloplasmin). 4  Increased plasma HDL and HDL2 cholesterol subfraction concentrations, reduced LDL cholesterol concentration, increased triglycerides levels. 5  Impaired glucose metabolism. 6  Reduced response to metyrapone test.

4  Carcinogenesis, Mutagenesis, And Impairment Of Fertility

Some beagle dogs treated with medroxyprogesterone acetate developed mammary nodules. Although nodules occasionally appeared in control animals, they were intermittent in nature, whereas nodules in treated animals were larger and more numerous, and persisted. There is no general agreement as to whether the nodules are benign or malignant. Their significance with respect to humans has not been established.

5  Pregnancy Category X

Norethindrone acetate is contraindicated during pregnancy as it may cause fetal harm when administered to pregnant women. Several reports suggest an association between intrauterine exposure to progestational drugs in the first trimester of pregnancy and congenital abnormalities in male and female fetuses. Some progestational drugs induce mild virilization of the external genitalia of female fetuses.

6  Nursing Mothers

Detectable amounts of progestins have been identified in the milk of mothers receiving them. Caution should be exercised when progestins are administered to a nursing woman.

7 Pediatric Use

Norethindrone acetate tablets are not indicated in children.

Adverse Reactions

See WARNINGS and PRECAUTIONSThe following adverse reactions have been observed in women taking progestins:• Breakthrough bleeding • Spotting • Change in menstrual flow • Amenorrhea • Edema • Changes in weight (decreases, increases) • Changes in the cervical squamo-columnar junction and cervical secretions • Cholestatic jaundice • Rash (allergic) with and without pruritus • Melasma or chloasma • Clinical depression • Acne • Breast enlargement/tenderness • Headache/migraine • Urticaria • Abnormalities of liver tests (i.e., AST, ALT, Bilirubin) • Decreased HDL cholesterol and increased LDL/HDL ratio • Mood swings • Nausea • Insomnia • Anaphylactic/anaphylactoid reactions • Thrombotic and thromboembolic events (e.g., deep vein thrombosis, pulmonary embolism, retinal vascular thrombosis, cerebral thrombosis and embolism) • Optic neuritis (which may lead to partial or complete loss of vision)

Dosage & Administration

Therapy with norethindrone acetate tablets must be adapted to the specific indications and therapeutic response of the individual patient.Secondary amenorrhea, abnormal uterine bleeding due to hormonal imbalance in the absence of organic pathology: 2.5 to 10 mg norethindrone acetate tablets may be given daily for 5 to 10 days to produce secretory transformation of an endometrium that has been adequately primed with either endogenous or exogenous estrogen.Progestin withdrawal bleeding usually occurs within three to seven days after discontinuing norethindrone acetate tablets therapy. Patients with a past history of recurrent episodes of abnormal uterine bleeding may benefit from planned menstrual cycling with norethindrone acetate tablets.Endometriosis: Initial daily dosage of 5 mg norethindrone acetate tablets for two weeks. Dosage should be increased by 2.5 mg per day every two weeks until 15 mg per day of norethindrone acetate tablets is reached.   Therapy may be held at this level for six to nine months or until annoying breakthrough bleeding demands temporary termination.

How Supplied

Norethindrone acetate tablets, USP are available as: 5 mg: White to off-white, oval, flat beveled edged tablet. 'P658'  is engraved on one side, and a breakline on the reverse.Available as follows: Bottle of 50                        NDC    16571-658-05 Bottle of 500                      NDC    16571-658-50Store at 20º to 25ºC (68º to 77ºF) [See USP Controlled Room Temperature].Manufactured by: Novast Laboratories Ltd. Nantong, China 226009Distributed by: Rising Pharmaceuticals, Inc. Saddle Brook, NJ 07663I0093Iss. 11/2018Rev.A

Patient Information

Norethindrone acetate     (nor-eth-IN-drone as-i-teyt) tablets, USPRead this PATIENT INFORMATION before you start taking norethindrone acetate tablets and read what you get each time you refill norethindrone acetate tablets. There may be new information. This information does not take the place of talking to your healthcare provider about your medical condition.What is the most important information I should know about norethindrone acetate tablets (A Progestin Hormone) tablets? • Do not use norethindrone acetate tablets if you are pregnant, breast-feeding or are trying to conceive. • Do not use norethindrone acetate tablets if you have had a previous blood clot, stroke, or heart attack. • Do not use norethindrone acetate tablets if you are postmenopausal.What are norethindrone acetate tablets? Norethindrone acetate tablets are similar to the progesterone hormones naturally produced by the body.What are norethindrone acetate tablets used for? Norethindrone acetate tablets are used for the treatment of secondary amenorrhea (absence of menstrual periods in women who have previously had a menstrual period who are not pregnant), the treatment of endometriosis, and the treatment of irregular menstrual periods due to hormone imbalance.Who should not take norethindrone acetate tablets? You should not take norethindrone acetate tablets if you are postmenopausal, pregnant or  breastfeeding. You should not take norethindrone acetate tablets if you have the following conditions: • Known or suspected pregnancy. Norethindrone acetate tablets are not indicated during pregnancy as it may cause fetal harm when administered to pregnant women. There is an increased risk of minor birth defects in children whose mothers take norethindrone acetate tablets during the first 4 months of       pregnancy (mild masculinization of the external genitalia of the female fetus, as well as hypospadias in the male fetus). If you take norethindrone acetate tablets and later find out you were pregnant, talk with your healthcare provider right away• History of blood clots in the legs, lungs, eyes, brain, or elsewhere, or a past history of these conditions • Liver impairment or disease • Known or suspected cancer of the breast. If you have or had cancer of the breast, talk with your healthcare provider about whether you should take norethindrone acetate tablets • Undiagnosed vaginal bleeding• Hypersensitivity to norethindrone acetate tablets. See the end of this leaflet for a list of all of the ingredients in norethindrone acetate tabletsWhat are the risks associated with norethindrone acetate tablets?• Risk to the Fetus: Norethindrone acetate tablets should not be used if you are pregnant. Norethindrone acetate tablets are contraindicated during pregnancy as it may cause fetal harm when administered to pregnant women. There is an increased risk of minor birth defects in children whose mothers take this drug during the first 4 months of pregnancy. Several reports suggest an association between mothers who take these drugs in the first trimester of pregnancy and congenital abnormalities in male and female babies. Although it is not clear that these events were drug related, you should check with your healthcare provider about the risks to your unborn child of any medication taken during pregnancy.You should avoid using norethindrone acetate tablets during pregnancy. If you take norethindrone acetate tablets and later find you were pregnant when you took it, be sure to discuss this with your healthcare provider as soon as possible.• Abnormal Blood Clotting: Use of progestational drugs, such as norethindrone acetate tablets, has been associated with changes in the blood-clotting system. These changes allow the blood to clot more easily, possibly allowing clots to form in the bloodstream. If blood clots do form in your bloodstream, they can cut off the blood supply to vital organs, causing serious problems. These problems may include a stroke (by cutting off blood to part of the brain), a heart attack (by cutting off blood to part of the heart), a pulmonary embolus (by cutting off blood to part of the lungs), visual loss or blindness (by cutting off blood vessels in the eye), or other problems. Any of these conditions may cause death or serious long-term disability. Call your healthcare provider right away if you suspect you have any of these conditions. He or she may advise you to stop using the drug.• Eye Abnormalities: Discontinue norethindrone acetate tablets and call your healthcare provider right away if you experience sudden partial or complete loss of vision, blurred vision, or sudden onset of bulging eyes, double vision, or migraine.These are some of the warning signs of serious side effects with progestin therapy: • Breast lumps • Dizziness and faintness • Changes in speech • Severe headaches • Chest pain • Shortness of breath • Pains in your legs • Changes in visionCall your healthcare provider right away if you get any of these warning signs, or any other unusual symptom that concerns you.Common side effects include: • Headache • Breast pain • Irregular vaginal bleeding or spotting • Stomach/abdominal cramps/bloating • Nausea and vomiting • Hair loss Other side effects include: • High blood pressure • Liver problems • High blood sugar • Fluid retention • Enlargements of benign tumors of the uterus (“fibroids”) • Vaginal yeast infections • Mental depressionThese are not all the possible side effects of progestin and/or estrogen therapy. For more information, ask your healthcare provider or pharmacist.What can I do to lower my chances of getting a serious side effect with norethindrone acetate tablets?• Talk with your healthcare provider regularly about whether you should continue taking norethindrone   acetate tablets • Have a breast exam and mammogram (breast x-ray) every year unless your healthcare provider tells you something else. If members of your family have had breast cancer or if you have ever had breast lumps or an abnormal mammogram, you may need to have breast exams more often • If you have high blood pressure, high cholesterol (fat in the blood), diabetes, are overweight, or if you use tobacco, you may have higher chances for getting heart disease. Ask your healthcare provider for ways to lower your chances of getting heart attacksGeneral information about the safe and effective use of norethindrone acetate tablets Medicines are sometimes prescribed for conditions that are not mentioned in patient information leaflets. Do not take norethindrone acetate tablets for conditions for which it was not prescribed. Do not give norethindrone acetate tablets to other people, even if they have the same symptoms you have. It may harm them.Keep norethindrone acetate tablets out of the reach of children.This leaflet provides a summary of the most important information about progestin and/or estrogen therapy. If you would like more information, talk with your healthcare provider or pharmacist. You can ask for information about norethindrone acetate tablets that is written for health professionals.What are the ingredients in norethindrone acetate tablets?Norethindrone acetate tablets contain the following inactive ingredients: lactose monohydrate, magnesium stearate, and microcrystalline celluloseManufactured by: Novast Laboratories Ltd. Nantong, China 226009Distributed by: Rising Pharmaceuticals, Inc. Saddle Brook, NJ 07663Iss. 11/2018Rev. A

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