Generic Name: mestranol and norethindrone (MESS tra nol and nor eth IN drone)
Brand Name: Necon 1/50, Norinyl 1+50
Medically reviewed on Mar 21, 2018
What is Necon 1/50?
Necon 1/50 is a combination drug that contains female hormones that prevent ovulation (the release of an egg from an ovary). This medication also causes changes in your cervical mucus and uterine lining, making it harder for sperm to reach the uterus and harder for a fertilized egg to attach to the uterus.
Necon 1/50 is used as contraception to prevent pregnancy.
Necon 1/50 may also be used for purposes not listed in this medication guide.
Do not use birth control pills if you are pregnant or if you have recently had a baby.
You should not take birth control pills if you have any of the following conditions: uncontrolled high blood pressure, heart disease, a blood-clotting disorder, circulation problems, diabetic problems with your eyes or kidneys, unusual vaginal bleeding, liver disease or liver cancer, severe migraine headaches, or if you have ever had breast or uterine cancer, jaundice caused by birth control pills, a heart attack, a stroke, or a blood clot.
Smoking can increase your risk of blood clot, stroke, or heart attack while taking birth control pills. You should not take Necon 1/50 if you smoke and are older than 35 years of age.
Before taking this medicine
Taking birth control pills can increase your risk of blood clots, stroke, or heart attack. You are even more at risk if you have high blood pressure, diabetes, high cholesterol, or if you are overweight. Your risk of stroke or blood clot is highest during your first year of taking birth control pills. Your risk is also high when you restart birth control pills after not taking them for 4 weeks or longer.
Smoking can greatly increase your risk of blood clots, stroke, or heart attack. Your risk increases the older you are and the more you smoke. You should not take combination birth control pills if you smoke and are over 35 years old.
Do not use if you are pregnant or think you might be pregnant. Tell your doctor right away if you become pregnant, or if you miss two menstrual periods in a row. If you have recently had a baby, wait at least 4 weeks before taking birth control pills.
You should not take birth control pills if you have:
untreated or uncontrolled high blood pressure;
heart disease (coronary artery disease, uncontrolled heart valve disorder, history of heart attack, stroke, or blood clot);
a blood-clotting disorder or circulation problems;
problems with your eyes, kidneys or circulation caused by diabetes;
a history of hormone-related cancer such as breast or uterine cancer;
unusual vaginal bleeding that has not been checked by a doctor;
liver disease or liver cancer;
severe migraine headaches (with aura, numbness, weakness, or vision changes), especially if you are older than 35;
a history of jaundice caused by pregnancy or birth control pills; or
if you smoke and are over 35 years old.
To make sure birth control pills are safe for you, tell your doctor if you have:
high blood pressure, varicose veins;
high cholesterol or triglycerides, or if you are overweight;
a history of depression;
a history of irregular menstrual cycles;
The hormones in birth control pills can pass into breast milk and may harm a nursing baby. This medication may also slow breast milk production. Do not use if you are breast feeding a baby.
How should I take birth control pills?
Follow all directions on your prescription label. Do not take Necon 1/50 in larger or smaller amounts or for longer than recommended.
You will take your first pill on the first day of your period or on the first Sunday after your period begins. You may need to use back-up birth control, such as condoms or a spermicide, when you first start using this medication. Follow your doctor's instructions.
Take one pill every day, no more than 24 hours apart. When the pills run out, start a new pack the following day. You may get pregnant if you do not take one pill daily. Get your prescription refilled before you run out of pills completely.
The 28-day birth control pack contains seven "reminder" pills to keep you on your regular cycle. Your period will usually begin while you are using these reminder pills.
You may have breakthrough bleeding, especially during the first 3 months. Tell your doctor if this bleeding continues or is very heavy.
If you need surgery or medical tests or if you will be on bed rest, you may need to stop using this medication for a short time. Any doctor or surgeon who treats you should know that you are using birth control pills.
While taking birth control pills, you will need to visit your doctor regularly.
Store at room temperature away from moisture and heat.
What happens if I miss a dose?
Follow the patient instructions provided with your medicine. Ask your doctor or pharmacist if you do not understand these instructions. Missing a pill increases your risk of becoming pregnant.
If you miss one active pill, take two pills on the day that you remember. Then take one pill per day for the rest of the pack.
If you miss two active pills in a row in Week 1 or 2, take two pills per day for two days in a row. Then take one pill per day for the rest of the pack. Use back-up birth control for at least 7 days following the missed pills.
If you miss two active pills in a row in Week 3, throw out the rest of the pack and start a new pack the same day if you are a Day 1 starter. If you are a Sunday starter, keep taking a pill every day until Sunday. On Sunday, throw out the rest of the pack and start a new pack that day.
If you miss three active pills in a row in Week 1, 2, or 3, throw out the rest of the pack and start a new pack on the same day if you are a Day 1 starter. If you are a Sunday starter, keep taking a pill every day until Sunday. On Sunday, throw out the rest of the pack and start a new pack that day.
If you miss two or more pills, you may not have a period during the month. If you miss a period for two months in a row, call your doctor because you might be pregnant.
If you miss a reminder pill, throw it away and keep taking one reminder pill per day until the pack is empty. You do not need back-up birth control if you miss a reminder pill.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
What should I avoid while taking birth control pills?
Do not smoke while taking birth control pills, especially if you are older than 35 years of age.
Birth control pills side effects
Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using Necon 1/50 and call your doctor at once if you have:
signs of a stroke--sudden numbness or weakness (especially on one side of the body), sudden severe headache, slurred speech, problems with vision or balance;
signs of a blood clot--chest pain, sudden cough, wheezing, coughing up blood, swelling or warmth in one or both legs;
heart attack symptoms--chest pain or pressure, pain spreading to your jaw or shoulder, nausea, sweating;
a change in the pattern or severity of migraine headaches;
swelling in your hands, ankles, or feet;
a breast lump; or
symptoms of depression--sleep problems, weakness, tired feeling, mood changes.
Common side effects may include:
breast tenderness or swelling;
freckles or darkening of facial skin, increased hair growth, loss of scalp hair;
changes in weight or appetite;
problems with contact lenses;
vaginal itching or discharge; or
changes in your menstrual periods, decreased sex drive.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What other drugs will affect birth control pills?
Some drugs can make birth control pills less effective, which may result in pregnancy. Other drugs may be affected by birth control pills. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide. Tell your doctor about all medicines you use, and those you start or stop using during your treatment with Necon 1/50. Give a list of all your medicines to any healthcare provider who treats you.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Copyright 1996-2018 Cerner Multum, Inc. Version: 7.01.
More about Necon 1/50 (mestranol / norethindrone)
- Necon 1/50 Side Effects
- During Pregnancy
- Dosage Information
- Drug Images
- Drug Interactions
- Pricing & Coupons
- En Español
- 7 Reviews
- Drug class: contraceptives
Other brands: Norinyl 1+50