• 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?

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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.

FAQ's

How long can I delay my period with Norethisterone?
Usually up to 17 days, depending on how long you take the tablets.

How quickly will my period return after stopping?
Normally within 2–3 days.

Does Norethisterone affect fertility?
No — your cycle goes back to normal once you stop taking it.

Is it safe to use for every holiday or event?
Occasional use is generally safe, but frequent use should be discussed with a prescriber.

Can I take it if I’m on the pill?
It depends on the type of pill. Always tell your prescriber which contraception you’re using.

Is it the same as contraception?
No. Norethisterone delays periods but does not prevent pregnancy.

What if I forget a dose?
Take it as soon as you remember. If it’s nearly time for the next dose, skip the missed one — do not double up.