• Delays your period for up to 17 days 
  • Ideal for holidays, events, or travel 
  • Widely used and trusted progestogen with fast-acting results

How it works?

Online Consultation

We ask you to complete a quick and easy consultation and get you started.

Choose condition

We have a selection of treatments available for various conditions.

Express Delivery

You will have complete visibility and control of your delivery.
Notice!

Before ordering this treatment, you may have to complete an online consultation

Overview

Whether it’s a holiday, wedding, festival, or once-in-a-lifetime event, your period doesn’t always arrive at the best time. Norethisterone tablets give you the power to delay your period safely and reliably — so you can feel confident, comfortable, and free to enjoy the moments that matter most. By temporarily adjusting hormone levels, this treatment lets you stay in control of your cycle without long-term effects.

This medicine requires a secure online consultation with a UK-registered prescriber, and will only be supplied if clinically appropriate.


What is Norethisterone


Norethisterone is a prescription-only tablet that contains a synthetic form of the hormone progesterone. It works by maintaining higher progesterone levels in the body, which prevents the womb lining from breaking down and delays the start of your period.

  • Typically delays periods for up to 17 days (sometimes longer under medical guidance).
  • Periods return within 2–3 days after stopping the tablets.
  • Does not affect future fertility — cycles usually go back to normal right away.


Norethisterone is one of the most widely used and trusted options for short-term period delay in the UK.

Directions

  • Start 3 days before your period is due.
  • Take one 5mg tablet, three times a day (every 8 hours).
  • Continue until you want your period to start, for a maximum of up to 17 days.
  • Your period will usually begin 2–3 days after stopping the tablets.
  • Always follow your prescriber’s exact instructions.

Side Effects

Like all medicines, this treatment can cause side effects, although not everyone experiences them. Most side effects are mild and temporary.

Common (may affect up to 1 in 10 people):

  • Nausea – some people may feel mildly sick, especially when first starting treatment. Taking the medicine with food may help reduce this.
  • Headache – generally mild and short-lived. Over-the-counter pain relief may help if needed.
  • Breast tenderness – you may notice some sensitivity or mild swelling, which usually improves over time.
  • Bloating or fluid retention – a feeling of fullness or mild swelling in the hands, ankles, or abdomen.


Uncommon (may affect up to 1 in 100 people):

  • Mood changes – including low mood, irritability, or feeling emotional. If this persists, speak to your doctor or prescriber.
  • Skin changes – such as mild acne or rash. These are usually temporary and improve with continued use.
  • Tiredness – a general feeling of fatigue or lack of energy, particularly in the early stages of treatment.


Rare but serious (seek urgent medical help):

  • Signs of a blood clot – such as swelling, pain, or redness in one leg; sudden chest pain; or difficulty breathing. These symptoms require immediate emergency care.
  • Severe allergic reaction – including swelling of the face, lips, or throat, difficulty breathing, or widespread hives.


 Disclaimer: This is not a full list of side effects. Always read the patient information leaflet that comes with your medication. If you notice anything unusual or concerning, stop taking the medicine and seek advice from a healthcare professional. In an emergency, call 999 or go to A&E.

Warnings

Norethisterone may not be suitable if you:

  • Have ever had a blood clot, DVT, or pulmonary embolism
  • Have liver disease or a history of jaundice in pregnancy
  • Experience migraine with aura
  • Are pregnant or breastfeeding
  • Have unexplained vaginal bleeding
  • Are allergic to norethisterone or any of its ingredients


It is not a form of contraception — you will still need additional protection to prevent pregnancy.

Frequently asked questions
  • What is norethisterone 5mg and how does it work for delaying a period?

    Norethisterone 5mg is a short-term hormonal medicine used to delay your period by keeping progesterone levels higher than usual. This prevents the natural drop that triggers bleeding. Once you stop it, hormone levels fall and your period starts a few days later. It is the most commonly prescribed period-delay option.

  • How long before my period should I start norethisterone 5mg?

    You should usually start norethisterone around three days before your expected period. Taking it too close to the start date may increase the chance of spotting or breakthrough bleeding. A clinician will confirm the best timing based on the length and regularity of your cycle.

  • How do I take norethisterone 5mg correctly?

    Norethisterone must be taken three times a day at evenly spaced intervals. Consistency is essential for reliable delay. You should continue taking the tablets until you want the period to start. If timing varies, breakthrough bleeding is more likely. Do not exceed the prescribed duration without medical advice.

  • What side effects can norethisterone 5mg cause?

    Common side effects include bloating, breast tenderness, mild stomach cramps, mood changes and fluid retention. These usually settle after stopping the tablets. Some people may experience spotting if doses are missed or taken late. Contact a clinician if symptoms feel severe or unusual.

  • Is norethisterone 5mg safe for short-term use?

    Yes. Short courses of norethisterone are safe for most people when prescribed after a proper assessment. It is widely used for short-term delay during travel, events, holidays or religious occasions. Your clinician will check medical history, clotting risks and medications to ensure suitability.

  • Who should not take norethisterone 5mg?

    Norethisterone is unsuitable if you are pregnant, have a history of blood clots, severe liver disease, hormone-sensitive cancers, certain migraines or uncontrolled medical conditions. Your prescriber will ensure it is safe for you and check whether an alternative option may be needed.

  • Can norethisterone interact with other medicines?

    Yes. Some medicines, including certain antibiotics, anti-epileptics and herbal products such as St John’s wort, can affect norethisterone’s reliability. Always declare all medicines and supplements so the prescriber can check for interactions before supply.

  • Is norethisterone 5mg the same as Utovlan or Primolut-N?

    Yes. Utovlan and Primolut-N are branded versions of norethisterone 5mg. They all work in the same way and contain the same active ingredient, so most people get identical results. The main differences are branding and packaging, not effectiveness. A clinician can recommend the best option for your needs.

  • Why might norethisterone 5mg not delay my period?

    Most delays occur reliably, but breakthrough bleeding is more likely if tablets are started too late, taken inconsistently or used alongside interacting medicines. Irregular cycles may also reduce predictability. Adjusting timing or reviewing your cycle pattern can improve effectiveness.

  • Can I drink alcohol while taking norethisterone?

    Yes. Alcohol does not affect how norethisterone works, but drinking heavily may worsen bloating, mood changes or fluid retention. Moderate alcohol intake is fine as long as you feel well and doses are taken on time.

  • What happens if I miss a dose of norethisterone 5mg?

    If you miss a dose, take it as soon as you remember unless it is nearly time for the next one. Missing doses increases the chance of spotting or an early bleed. Try to maintain consistent timing for the most reliable period delay.

  • How soon will my period come after stopping norethisterone?

    Most people get a withdrawal bleed two to four days after stopping, although timing can vary slightly. This bleed is normal and signals that hormone levels have returned to baseline. Your next cycle usually settles back into its regular pattern.

  • Can I take norethisterone 5mg with the contraceptive pill?

    It depends on the type of pill. Combined pill users may be able to run packs back-to-back instead. Mini-pill users may still require norethisterone for reliable delay. Your clinician will confirm the safest and most effective option.

  • Can norethisterone help with painful or heavy periods?

    Norethisterone is not a long-term treatment for heavy or painful periods, but some people notice temporary relief during a delay. If these symptoms persist, you may need separate assessment and treatment options tailored to your menstrual health.

  • What should I do if I get spotting or cramps during treatment?

    Mild spotting or cramping can occur, especially if your natural bleed was due soon. Continue taking the tablets unless bleeding becomes heavy. If symptoms worsen or feel unusual, speak with a clinician for guidance or alternative options.