Norethisterone 5mg

Buy Norethisterone for Period Delay

Norethisterone works by preventing the lining of the womb from being shed, therefore delaying your period until you stop taking the tablets. You will need to take one Norethisterone tablet three times a day, starting three days before your period is due to commence. Your period will be delayed whilst you are taking the tablets and should start 2 -3 days after you stop taking them. Please note that Norethisterone is for occasional use only. Do not use more than once in 4 months. Please discuss with your doctor if you need to manage your period for longer.

All our products are genuine UK medicines and are dispensed by our partner pharmacy based in the UK.

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  • Same active ingredient as the branded Primolut N
  • Available as a 10, 20 or 30 day course
  • Needs to be taken at least 3 days before your period is due
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Norethisterone tablets belong to a group of medicines called 'Progestogens'. Progestogens are similar to the natural female hormone progesterone. Norethisterone tablets contains the progestogen called norethisterone as the active ingredient.


Do not take Norethisterone tablets:

  • if you are allergic (hypersensitive) to norethisterone, or other similar hormone medicines, or any of the other ingredients listed in the patient information leaflet
  • if you are pregnant or think you might be pregnant
  • if you have now or have ever had any vaginal bleeding (not a period) for which your doctor could not find a cause
  • if you or a member of your family have ever had a problem with blood clots, including deep vein thrombosis (DVT)
  • if you have now or have had in the past, a heart attack or angina
  • if you have liver problems
  • if you have ever had a pregnancy where you had jaundice, or an itchy rash known as pemphigoid gestationis - this rash appears as small blisters on your abdomen
  • if you have severe generalised itching all over your body (pruritis)
  • if you have a condition known as porphyria (a rare inherited blood disease)

You must tell your doctor if you have any of the following conditions:

  • epilepsy
  • migraine headaches
  • asthma
  • heart problems
  • kidney problems
Pregnancy and Breastfeeding

Norethisterone tablets must not be taken if you are pregnant as hormonal medicines can affect the developing baby. It is important you use some form of contraception (e.g. a condom) while taking Norethisterone tablets, as it is not a contraceptive. Do not take Norethisterone tablets if you are breastfeeding.

Important Interactions

You must tell your doctor if you are taking, have recently taken or might take other medicines, in particular:

  • medicines to treat epilepsy (e.g. phenytoin, carbamazepine)
  • antibiotic medicines to treat an infection (e.g. tetracyclines, rifampicin, co-trimoxazole)
  • antiviral medicines to treat HIV (e.g. ritonavir, nelfinavir)
  • anticancer medicines
  • herbal preparations containing St John's wort (Hypericum perforatum)
  • aminoglutethimide, sometimes used in Cushing's Syndrome
  • ciclosporin (for suppressing the immune system)
  • non-steroidal anti-inflammatory drugs (NSAIDs) for treating pain and inflammation
  • medicines for high blood pressure
Side Effects
  • vaginal bleeding, including spotting.
  • vaginal bleeding, including spotting.
  • headache
  • feeling sick (nausea)
  • absence of a period
  • swelling
Please Note

All medication can cause side effects. We have only listed a few to be aware of. Details of all side effects, including rare side effects to be aware of, are listed in the patient information leaflet (PIL). When completing your medical questionnaire, it is very important that you answer the questions truthfully. This is to ensure your doctor has a full picture of your medical history before prescribing. List all medicines you are already taking, including non-prescription and herbal medicines.


Women looking to delay their period more frequently should consider other methods such as the contraceptive pill. Please discuss this with your regular GP who will assess you for suitability, as the contraceptive pill is only available to order online for patients that have already stabilised on this medication.

Looking after your medicine

Do not take medicines after the expiry date stamped on the pack. Keep all medicines out of the reach and sight of children.

Medicines are only intended to be used by the person they are prescribed for. Do not give your prescribed medicine to anybody else, even if they have the same symptoms as you. Medicines can be harmful if used by anybody other than the person they have been prescribed for.

References Norethisterone 5mg Patient Information Leaflet
British National Formulary: norethisterone

Whilst medicines containing the active ingredient norethisterone have become available over the counter recently, you may still wish to have an online doctor consultation to ensure you are taking the correct medication for your needs. As such, Norethisterone tablets are only available with a valid prescrption. Some women decide to use a longer-term solution for managing their periods following a doctor consultation. It is important to also consider your contraception needs when deciding which solution is suitable for you.

Norethisterone tablets are the generic form of medicine containing the active ingredient norethisterone. This is also available under the brand name Primolut N (Bayer). Both contain the same amount of the active ingredient norethisterone and are therefore identical medicines. There are also other treatment options to postpone periods, including medroxyprogesterone acetate, however this is not available online through Anytime Doctor.

Yes, you can get pregnant whilst taking Norethisterone. Norethisterone is not a contraceptive. It is very important that you use alternative methods of contraception such as condoms if you do not intend to get pregnant. Please discuss with your doctor if you are planning to get pregnant and read the advice above (see 'Pregnancy and Breastfeeding' above) and in the patient information leaflet.

Last reviewed & updated  17/09/2019   Authored  24/09/2009

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