We use website cookies to ensure that you receive the best experience. If you're happy and would like to carry on browsing click 'Accept', or find out more about our Cookie Policy. Accept

Unsure about a treatment?
Ask our medical team for impartial information and advice about any treatment we provide or medical condition that we treat before you buy.

*Prescription medicines are supplied subject to a medical consultation at the discretion of a doctor.

  • What is Norethisterone?

    Norethisterone is a tablet that a woman can use to delay her period. These tablets contain synthetic progestogen, a female hormone involved in menstruation. Usually, it is a drop in progestogen levels which initiates a woman’s period. Norethisterone prevents the womb lining from being shed at its normal point in the cycle, causing the period to be delayed.

    Norethisterone is also prescribed to treat other menstrual problems including heavy periods and severe pain. Consult with your GP if you think you might need Norethisterone for these purposes.

  • How often should I take Norethisterone?

    You should take Norethisterone three times each day – one 5mg tablet in the morning, at midday, and at night. Norethisterone will be most effective if taken at a similar time each day. These tablets are available in packs of 30, 60 or 90. These correspond to a period delay of 10, 20 and 30 days, respectively.

  • Can I delay my period with contraceptive pills?

    Yes, though the routine will vary depending on your type of contraceptive pill:

    • Fixed dose combined contraceptive pills combine the same combination of oestrogen and progestogen for the duration of the cycle. These require you to have a pill-free week for a withdrawal bleed. You can delay your period by skipping this withdrawal week and immediately starting your next pack.
    • Every Day contraceptive pills contain seven hormone-free pills, which you take instead of having a pill-free week. Delaying your period requires that you take hormones each day. So, with the ED pill, you will need to skip taking these ‘dummy’ pills and immediately start your next pack.
    • Bi-phasic contraceptive pills vary their combination of oestrogen and progestogen, depending on the day of your cycle. To delay your period, you must skip your pill-free week and continue to take the type of pills just before the pill-free week, which is higher in progestogen. This will involve skipping the first section of the pack.
    • The mini pill contains progestogen only. The mini pill contains only 0.35 mg of progestogen. Delaying your period requires three 5mg doses of Norethisterone each day. So, to delay your period, you will need to take Norethisterone on top of your regular contraceptive routine.
  • When might I want to delay my period?

    This is entirely a matter of preference – many women take Norethisterone to avoid menstruating while on holiday or at a significant event.

    There are also some medical reasons why doctors may recommend Norethisterone. It can help women who suffer from heavy or painful periods, endometriosis, and severe premenstrual symptoms. Women at an advanced stage of breast cancer may also be prescribed Norethisterone.

  • What are some side effects of Period Delay medication?

    Side effects of Norethisterone include:

    • Change in libido
    • Headaches
    • Bloating
    • Nausea
    • Breast tenderness

    If you have been using Norethisterone for a long time, you may notice breakthrough bleeding. Consult your GP immediately if you notice anything unusual whilst on Norethisterone, as there may be some more severe side effects in rare cases.

  • Will Norethisterone prevent me from getting pregnant?

    Norethisterone on its own does not prevent pregnancy. So, you should use normal contraceptive methods while delaying your period.

    If you are delaying your period by modifying your contraceptive pill routine, or by combining Norethisterone with the mini pill, you will be protected from pregnancy so long as you use the contraception correctly.

  • What is the longest I can delay my period for?

    To avoid more serious potential side effects, you should take Norethisterone for no more than two weeks if possible. If on the contraceptive pill, you should delay your period only until your next pill-free week unless your GP has advised otherwise.

  • Is it dangerous to delay my period?

    It is usually not dangerous at all to use Norethisterone or the contraceptive pill to delay your period for a short amount of time. There is a low incidence of side effects, even for the mild complications like nausea and headaches.

  • For how long will Norethisterone delay my period?

    Once you stop taking Norethisterone, your period will likely resume three or four days later. If you are delaying your period with the pill, your withdrawal bleed will occur as normal on the next pill-free week of your cycle.

  • Will my period be heavier after being delayed?

    Norethisterone works by preventing the womb lining from being shed. So, it is possible that your period will be somewhat heavier than normal once it resumes. If you have only delayed your period for a short period of time, this should not be too noticeable. This is why you should not delay your period more than once during one menstrual cycle.

  • How often can I delay my period?

    It is important that you allow your body to have normal cycles so that your hormones go back to their natural cycles. Ideally, you should go several months before delaying your period again.

  • Is Norethisterone suitable for me?

    Period delay tablets are suitable for most women who do not take oral contraceptives. Exceptions include women who:

    • Are at risk of blood clots or deep vein thrombosis
    • Have a history of unexplained vaginal bleeding
    • Are allergic to any of the ingredients
    • Are pregnant or breastfeeding
    • Have heart or liver problems
    • Suffer from skin conditions like jaundice or pemphigoid during pregnancy
    • Have porphyria (a blood condition) or pruritus (a severe itching)

    Before you begin delaying your period, you should go over your current medications with your GP. This is because Norethisterone may cause complications when combined with certain other medications.

Authored By:

A photo of Dr Donald Grant

Dr Donald Grant

MB ChB DRCOG MRCGP Dip.orth.med

Published on: 29-05-2019

Last modified on: 29-05-2019

Dr Don Grant is a GP with over 30 years experience and is the Clinical Advisor at The Independent Pharmacy

Reviewed By:

A photo of  Chris Newbury

Chris Newbury

BPharm IP

Reviewed on: 29-05-2019

Next review date: 29-05-2021

Chris is a vastly experienced clinical pharmacist and has been registered as an Independent Prescriber since 2014.

Can't find what you're looking for?

If you can't find what you are you looking for, please contact our support team on 0333 2200 519 for help and advice.

How does it work?

It's easy! Follow our simple process to get the treatment or advice you need in no time.

  • 1 Complete a simple health questionnaire
  • 2 A healthcare professional reviews your answers
  • 3 You receive the right treatment or advice
  • 4 Easily re-order in a few clicks

We are a trusted online pharmacy

We are regulated by a number of organisations in the UK including the MHRA, GPhC & CQC to ensure we offer the highest level of service to every one of our customers.

Rated Excellent based on over 16,000 reviews from Google & Reviews.io
5 out of 5 stars
Excellent service, thank you! I feel so lucky to have found this pharmacy. I am getting my treatment without needing to go to a GP, as they have their own doctors who assess the symptoms.
5 out of 5 stars
Very safe and very quick delivery Because we are isolating this site has been so important to myself and family. Would highly recommend this site.
5 out of 5 stars
Very impressed Used for the very first time, very impressed with cost, variety of products and prompt delivery - well recommended.
5 out of 5 stars
Helpful and efficient I've used The Independent Pharmacy for over a year; they are professional, helpful and efficient.
5 out of 5 stars
Exactly as described and fast delivery Exactly as described and fast delivery
5 out of 5 stars
A brilliant and reliable company As usual the service is better than the last time, such a brilliant and reliable company who keep you updated throughout. Thank you for such a loyal and quick service.
5 out of 5 stars
Can recommend Found this a very convenient and useful source of comprehensive online medication. Answer a few questions then easy order procedure. Reasonable prices and delivery. Can recommend from personal experience.
5 out of 5 stars
Quick and professional Ordering and payment were professionally and quickly dealt with. Delivery was on time, and with the correct items well packed. Couldn't really ask for any better service than this!
5 out of 5 stars
Excellent service Excellent service, quick and easy to sort out, fast delivery
5 out of 5 stars
You passed with flying colours. I'll definitely recommend you You did absolutely fine! I've never ordered from an online pharmacy before because it's difficult to know which ones are legitimate, but all of your positive reviews made me take the risk, though I only ordered a single product, as a test.

Your basket

Your basket is empty

Start shopping

Did you know you can search from anywhere on the site? Simply press 's' on your keyboard and our quick search tool will appear.

Alternatively you can view a list of all of our treatments and treated conditions.

If you can't find what you are looking for, please contact our support team on 0333 2200 519.