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Norethisterone contains a hormone which is similar to the hormone progestogen that is naturally produced by the body. It is used to treat a number of menstrual cycle conditions.

Normally before a period is due there is a fall in the level of progestogen hormone in the body. When it falls below a certain level, the lining of the uterus is shed as menstrual period. By taking Norethisterone this is delayed until you stop taking the medication.

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What is Norethisterone?

Norethisterone is a man-made version of progesterone, the hormone that controls your periods. Norethisterone tablets help to delay your period.

How does Norethisterone work?

On a normal cycle, your period starts when levels of progesterone drop. As Norethisterone is a man-made version of progesterone, it helps to keep levels high, delaying the onset of a period.

How to take?

1 tablet, three times a day starting three days before your period is expected to start. Your period should occur 2-3 days after you have stopped taking the medicine.

Norethisterone tablets can be used to delay a period for a maximum of 17 days and needs to be started 3 days before your period (a total of 20 days).

Norethisterone should not be used to delay your period more than once every 6 months.

Side Effects

When used for period delay, Norethisterone can cause side effects but these are uncommon. You you may experience nausea, breast tenderness, fatigue, headache Dizziness, breast tenderness, bloating, changes in weight, feeling tired or difficulty sleeping, feeling depressed, lack of interest in sex, skin reactions.

If you experience any of the following uncommon but serious symptoms, stop taking norethisterone and contact your doctor for advice straightaway:

  • Any feeling of pain and tightness in your chest.
  • Any disturbances of your vision or hearing.
  • Any unusually severe headaches.
  • Jaundice

Read the patient information leaflet for a full list of side effects.


How do I take Norethisterone?

Take one Norethisterone tablet three times a day. Start your course three days before your period is expected to start. Continue taking one tablet (three times a day) until you no longer need to delay your period. You can only take Norethisterone for a maximum of 17 days.

When will I bleed once I stop taking Norethisterone?

Your period should occur 2 to 3 days after you stop taking Norethisterone.

What are the side effects of Norethisterone?

Side effects of Norethisterone are uncommon but may include nausea, breast tenderness, fatigue and headaches. Please see the ‘side effects’ tab for more information on severe symptoms.

Is Norethisterone a form of contraception?

Period delay tablets like Norethisterone are not contraceptives. You cannot use Norethisterone to protect against pregnancy.

How much does Norethisterone cost?

The cost of Norethisterone will depend on the length of your course. Here at Express Pharmacy, prices start from £18.99.

Can I buy Norethisterone online?

Yes - you can buy Norethisterone period delay tablets online. However, you must complete an online assessment so that we can issue you with a prescription (if you are suitable for the treatment).


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Patient Information

Before taking any medication, it is important to read the Patient Information Leaflet. You can find the information by searching for your treatment on Medicines.org.uk.

If you have any questions about your treatment please refer to Medicines.org.uk or contact us.

Norethisterone Patient Information Leaflet

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