• Mestranol/Norethisterone

Norinyl-1 is an oral birth control pill. It is made up of a combination of artificial hormones, and is marketed in the UK by Pharmacia.

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In each tablet is 1mg of norethisterone and 50 micrograms of mestranol. The tablets are taken at the same time daily for the first three out of every four weeks of your menstrual cycle.

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Norinyl-1 is a hormonal birth control tablet marketed in the UK by Pharmacia. It prevents pregnancy by convincing the body that it does not need to ready itself for conception, through the induction into the body of supplementary versions of progesterone and oestrogen. As a combined pill, it is taken once a day for the first three out of every four weeks of the user’s menstrual cycle. To be effective, it should be taken at the same time each day.

  1. Rate of effectiveness is 99%
  2. Can relieve menstrual bleeding
  3. Easy-to-use pill

In preparing itself for pregnancy, the body must go through a series of procedures. These are regulated by the hormones, progesterone and oestrogen. One such procedure is ovulation, which involves the release of an egg from the ovary, into the fallopian tube. It then journeys to the uterus, and is ready to be fertilised by male sperm during the course of this movement. After it has arrived at the uterus, the fertilised egg will attach itself to the uterine wall, or endometrium, before beginning the next stage of its development.

The layering up and breaking down of the uterine wall lining is another task the body performs which is managed by hormones. At a certain point each month, this wall is receptive to implantation from an egg, before the consistency of it breaks down and it is shed through periodic bleeding.

Contained in Norinyl-1 are synthetic versions of each of these hormones. They are called mestranol and norethisterone, and by establishing a presence in the body, they effectively convince the reproductive system that pregnancy has already begun, even though it has not. This prevents the ovary from releasing an egg ready for fertilisation, and makes the quality of the uterine wall lining less receptive to harboring an egg. Another function these synthetic hormones perform is to increase the density of vaginal fluid. This makes the cervix harder for sperm to traverse.

Getting to the doctor in person isn’t always easy. Sometimes, work and life can get in the way. But here at, we’re dedicated to making the lives of our customers easier. To get the pill you need, we won’t make you book an appointment. All you need to do is fill in our simple questionnaire. Each order is reviewed by a doctor prior to being dispensed by our UK-based pharmacy, and shipped by tracked courier.

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How to use Norinyl-1

For optimum results and to limit the risk of potential side effects, take the pill as prescribed by your doctor, and refer to the instructions in the leaflet provided prior to first use.

  1. Take as instructed by your physician.
  2. In most cases, this will be one tablet taken at the same time daily, for the first 21 consecutive days of your 28-day menstrual cycle.
  3. Repeat this process every month.
  4. It is recommended that you start using this pill on the first day of your period, unless you are switching from another product or have recently been pregnant. In these cases, you should consult the leaflet provided for further guidance.
  5. Swallow tablets with water, whole. Do not chew them.
  6. Never take more than your prescriber has told you to.
  7. Do not make up for a missed dose with a double dose. If you forget to take your pill, read the instructions in the leaflet carefully to find out what you should do next. Further advice can be obtained from your doctor or family planning nurse if you require it.

These instructions are provided as a guide and do not constitute detailed directions. Read the information in the leaflet supplied fully before use.

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Norinyl-1 side effects

When using any treatment it is important to be aware of the side effects your medication may cause, as some of them may require that you seek medical advice as a matter of urgency.

Go to your nearest hospital as soon as possible if you display any symptoms which may be related to a blood clot or an allergic reaction. Signs of an allergic reaction include: sudden wheeziness, difficulty breathing, chest pain, fever, sudden swellings, rash or itching; whereas a blood clot may be indicated by; coughing up blood; painful or inflamed veins in your legs; swelling or tenderness in your stomach; sudden sharp or severe pain in the chest; shortness of breath or finding breathing painful; first attack of migraine or worsening migraines if you already have them; sudden and unusual severe headaches; dizziness; or problems with sight or speech.

Frequency unknown:
Upset stomach, headache, feeling or being sick, changes in appetite, weight fluctuations, high blood pressure, depression, swollen or sore breasts, change in sex drive, worsening of womb disorders or irregular vaginal bleeding.

This list is not comprehensive. A more detailed index of side effects can be located in the leaflet supplied.

Taking it with other medications

If you are using other treatments, let your prescriber know. The following may interact with Norinyl-1 or make it less effective: carbamazepine; oxacarbazepine; phenobarbital; phenytoin; primidone; topiramate; St John’s wort; nelfinavir; nevirapine; ritonavir; rifabutin; rifampicin; griseofulvin; or modafinil.

Conditions to look out for

Do not take this pill if you have or have ever had: thrombosis, or if anyone in your family is susceptible to this; a heart attack, stroke or angina; hyperlipidaemia; cancer of the breast, cervix, vagina or womb; pruritus, jaundice or pemphigoid gestationis during previous pregnancy; severe chronic liver disease; unexplained vaginal bleeding; or severe migraines.

This pill may also not be suitable for you if you have a history of; migraines; headaches; visual disturbances; asthma; epilepsy; diseases of the heart and blood vessels; hypertension; kidney disease; diabetes; multiple sclerosis; tetany; breast problems; varicose veins; liver dysfunction; depression; fibroids in your uterus; porphyria; sickle-cell anaemia; otosclerosis; gallstones; or irregular periods.

Q&A: our Norinyl-1 discussion forum

Can I still drink alcohol?

Yes. It is safe to consume alcohol while using this treatment.

Will I still be able to drive?

Yes. Your capacity to drive should not be compromised by this product. But avoid driving if you notice any side effects which may make driving unsafe, and let your doctor know right away.

Can I take this medicine while pregnant?

No. You should not use the pill if you are pregnant or suspect you may be, or if you are breastfeeding. Those who are breastfeeding may be able to locate alternative forms of birth control by consulting their GP or reading our minipill pages.

How do I store it?

Never store above 25°C and keep out of the reach of children.

Am I allergic to anything in the medicine?

Contained in this pill are the following ingredients: norethisterone, mestranol, maize starch, polyvidone, magnesium stearate and lactose. Do not use it if you are allergic to or unable to tolerate any of these components.

Is it available over-the-counter?

As it is a prescription-only medication, you can only buy Norinyl-1 in the UK if you have consulted with a doctor first. Completing our health questionnaire will enable you to have your case reviewed by a registered practitioner.

Is it right for me?

All you need to do to discover if Norinyl-1 is right for you is fill in our medical survey. A physician will assess your case based on the answers you provide. Approved orders will then be dispensed and shipped by our UK-based pharmacy. Courier services are used to deliver our orders, so that you can relax in the knowledge that your items will be handled with the utmost care and be with you in just one working day.


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