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Norethisterone
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Norethisterone is a synthetic progestogen used to delay menstruation or treat conditions such as heavy periods and endometriosis by mimicking the effects of the natural hormone progesterone.
- Effectively delays your period for up to 17 days when taken correctly
- Also used to manage heavy, painful, or irregular menstrual cycles
- Access a registered UK prescriber for a private prescription
- Your medication is shipped in plain packaging from our UK pharmacy
More information
"Norethisterone is a versatile hormonal treatment that we primarily prescribe for patients looking to delay their period for travel or special events, as well as those managing endometriosis or menorrhagia. As a progestogen, it works by supporting the uterine lining to prevent it from shedding prematurely, providing reliable cycle control when started three days before your expected period." - Rachael Clarke MRCPharm MFRPSI FRSPH (GPHC Number: 2061366)
You can buy Norethisterone safely through Mail my Meds by completing a short online consultation that is reviewed by one of our registered UK prescribers. If your consultation is approved, a prescription will be issued and your treatment will be dispensed and shipped directly from our registered pharmacy (GPHC Number: 9011560). This process ensures you receive genuine medication discreetly and conveniently without needing a face-to-face GP appointment.
The cost of Norethisterone depends on the duration of treatment required for your specific needs, such as the length of period delay or the management of chronic conditions. While private prescription prices vary compared to the standard NHS levy, our service includes the cost of the online clinical assessment and discreet delivery. You can view the current pricing options during the selection process before you finalise your order.
We offer several delivery methods to ensure you receive your period delay tablets or health treatments in time for your deadline or holiday. All orders are dispatched in plain, unbranded packaging to maintain your privacy, with tracked options available so you can monitor your parcel's progress from our pharmacy to your doorstep.
Norethisterone is a medication belonging to the progestogen group of hormones, which are similar to the progesterone naturally produced in the female body. It is most commonly used as a short-term treatment to delay a period, but it is also highly effective for managing dysmenorrhoea (painful periods), menorrhagia (heavy bleeding), and endometriosis. In the UK, it is a prescription-only medication (POM), meaning it must be overseen by a healthcare professional.
The active ingredient in this medication is norethisterone, usually provided in a 5mg strength tablet for menstrual cycle management. Each tablet also contains inactive ingredients which typically include lactose, maize starch, and magnesium stearate. If you have a known allergy to any of these components, particularly lactose, you should inform your prescriber during the consultation.
Many users report high satisfaction with Norethisterone for its reliability in postponing menstruation during holidays, weddings, or athletic competitions. While the majority of patients tolerate the medication well, some individuals experience mild, temporary symptoms such as bloating or breast tenderness. Most users find that their natural cycle returns to normal within a few days of stopping the tablets.
The Patient Information Leaflet (PIL) is included in every box of medication and contains essential details on usage, safety, and potential drug interactions. It is important to read this document thoroughly before starting your treatment. You can also access digital versions of the leaflet on the electronic Medicines Compendium (eMC) website to review the full safety profile of the 5mg tablets.
Norethisterone works by mimicking the natural hormone progesterone to keep the levels in your body high enough to prevent the lining of the womb from shedding. Usually, a drop in progesterone levels triggers your period. By maintaining these levels with a synthetic substitute, the medication "pauses" the cycle. Once you stop taking the tablets, the hormone levels fall, and your period typically starts within two to three days.
To delay your period, you must start taking the tablets at least three days before your period is expected to begin. If you start the treatment after your period has already begun, it will not be effective at stopping the bleed. Ensure you take the tablets at the same time each day to maintain consistent hormone levels in your bloodstream for maximum efficacy.
The standard dosage for period delay is one 5mg tablet taken three times a day for the duration of the delay required. For other conditions like heavy periods or endometriosis, the dosage and frequency may differ significantly. Always follow the specific instructions provided on your prescription label by the pharmacist.
Like all medicines, Norethisterone can cause side effects, although not everyone will experience them. Most side effects are mild and resolve quickly once the treatment is finished.
| Common Side Effects | Rare/Serious Side Effects |
|---|---|
| Nausea and stomach upset | Sudden chest pain or shortness of breath |
| Breast tenderness | Severe headache or vision changes |
| Bloating or fluid retention | Yellowing of the skin (jaundice) |
| Mood changes or headaches | Signs of a blood clot in the leg |
Norethisterone is not a contraceptive and will not prevent pregnancy, so you must use a barrier method like condoms if you are sexually active. This medication is not suitable for individuals with a history of blood clots (VTE), active liver disease, or certain hormone-sensitive cancers. It should also be avoided if you are pregnant or breastfeeding, or if you have unexplained vaginal bleeding that has not been investigated by a doctor.
Norethisterone is the most frequently prescribed dedicated period delay tablet in the UK due to its high efficacy rate. Other options include Medroxyprogesterone (Provera), which is sometimes used off-label if Norethisterone is not suitable. For those already taking a combined oral contraceptive pill, delaying a period is often achieved by skipping the pill-free break rather than using separate 5mg progestogen tablets.
How long can I delay my period for?
You can typically delay your period for up to 17 days by taking a 20-day course of tablets (starting 3 days before your period). Longer durations should only be undertaken if specifically directed by your doctor.
Can I drink alcohol while taking Norethisterone?
There is no direct interaction between alcohol and Norethisterone, so moderate consumption is generally fine. However, heavy drinking that leads to vomiting within two hours of taking a dose may stop the medication from being absorbed effectively.
Will Norethisterone affect my future fertility?
No, there is no evidence that short-term use of Norethisterone for period delay has any lasting impact on your fertility or your ability to conceive in the future.
The information provided here is for general informational purposes only and should not replace seeing a medical professional for personalised advice. Always consult with a qualified healthcare provider before starting any new medication to ensure it is safe for your specific health profile.
Our content is regularly reviewed by our team of medical experts to ensure it is up to date and accurate. We strive to provide reliable health information that reflects current UK clinical guidelines and pharmaceutical best practices.
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