Check with your doctor before refilling an old prescription, especially after a pregnancy. © 1998-2020 Mayo Foundation for Medical Education and Research (MFMER). Check with your doctor immediately if you have trouble wearing contact lenses or if blurred vision, difficulty with reading, or any other change in vision occurs during or after treatment. Our general interest e-newsletter keeps you up to date on a wide variety of health topics.It is very important that your doctor check your progress at regular visits to make sure this medicine is working properly and does not cause unwanted effects. You might need a pregnancy test. Micronor Tablets 28-Day: Norethindrone belongs to the class of medications called oral contraceptives (birth control pills). Combined hormonal versus nonhormonal versus progestin-only contraception in lactation (Review). Certain drugs, herbal products, or health problems could cause norethindrone (contraceptive) to not work as well. These visits will usually be every 6 to 12 months, but some doctors require them more often. However, many people have no side effects or only have minor side effects. If you miss two periods in a row, talk to your doctor. POPs will not delay your ability to get pregnant.If you are breastfeeding, POPs will not affect the quality or amount of your breast milk or the health of your nursing baby.

If you suspect that you may be pregnant, stop using this medicine immediately and check with your doctor. However, isolated post-marketing cases of decreased milk production have been reported. If you do get pregnant while taking POPs, you have a slightly higher chance that the pregnancy will be ectopic than do users of some other birth control methods. Norethindrone is also used to treat abnormal periods or bleeding and to bring on a normal menstrual cycle in women who menstruated normally in the past but have not menstruated for at least 6 months and who are not pregnant or undergoing menopause (change of life). If used perfectly, the first-year failure rate for progestin-only oral contraceptives is 0.5%. An ectopic pregnancy is a pregnancy outside the womb. There was no increase in the frequency of having breast cancer diagnosed ten or more years after cessation of use.Women with breast cancer should not use oral contraceptives because the role of female hormones in breast cancer has not been fully determined.Some studies suggest that oral contraceptive use has been associated with an increase in the risk of Studies have shown an increased risk of developing Patients should be counseled that this product does not protect against It is considered good medical practice for sexually active women using oral contraceptives to have annual history and physical examinations. Revised: Sep 2015Adverse reactions reported with the use of POPs include:The following adverse reactions were also reported in clinical trials or during post-marketing experience:The effectiveness of progestin-only pills is reduced by hepatic enzyme-inducing drugs such as the anticonvulsants phenytoin, carbamazepine, and Concurrent use of bosentan and norethindrone containing products may result in decreased concentrations of these contraceptive hormones thereby increasing the risk of unintended pregnancy and unscheduled bleeding.Irregular menstrual patterns are common among women using progestin-only oral contraceptives. You may also report side effects at https://www.fda.gov/medwatch. Small amounts of progestins pass into the breast milk of nursing mothers, resulting in detectable The limited available data indicate a rapid return of normal There have been no reports of serious ill effects from overdosage, including ingestion by children.Progestin-only oral contraceptives (POPs) should not be used by women who currently have the following conditions:Serum progestin levels peak about two hours after oral administration, followed by rapid distribution and elimination. Do not use this medicine if you smoke cigarettes. If you do get pregnant while taking POPs, you have a slightly higher chance that the pregnancy will be ectopic than do users of some other birth control methods. 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 or irregular menstruation (periods), and other symptoms. Norethindrone is used to prevent pregnancy. Your risk is even higher if you have diabetes, high blood pressure, high cholesterol, or if you are overweight. There is insufficient data to determine whether the use of POPs similarly increases this risk.A meta-analysis of 54 studies found a small increase in the frequency of having breast cancer diagnosed for women who were currently using combined oral contraceptives or had used them within the past ten years. Cautions for Norethindrone Acetate Contraindications. All rights reserved. It is meant to be used along with talking with your healthcare professional.Progestin-only pills are often called "POPs" or "the About 1 in 200 POP users will get pregnant in the first year if they all take POPs perfectly (that is, on time, every day). The Cochrane Collaboration. If you think you have become pregnant while using the medicine, tell your doctor right away. Follow all instructions closely. Vaginal bleeding of various amounts may occur between your regular menstrual periods during the first 3 months of use.