Levonorgestrel

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Levonorgestrel is a progestin hormone contraceptive pill that can be taken up to 72 hours after unprotected sex to prevent pregnancy. The hormonal contraceptive comes as a single dose. The medication should be taken immediately after unprotected sex to maximize effectiveness. Levonorgestrel has a 95% chance of preventing any unplanned pregnancy if taken according to the leaflet instructions.

Available Strength 1500mcg

Available Quantity Pack of 1

Levonorgestrel is an emergency contraceptive pill that can be taken up to 72 hours (3 days) after unprotected sex.

A single tablet
Works up to 3 days after sex
The sooner you take it, the better it works
Reviewed by UK-registered clinicians

What is Levonorgestrel?

What Is Levonorgestrel?

How Does Levonorgestrel Work?

The active ingredient, 1.5mg of Levonorgestrel, works by blocking the release of eggs from the ovaries. The substance inhibits the fertilisation of released eggs and their attachment to the womb lining. For women to become pregnant, the eggs require to be removed and get fertilised by sperm. Levonorgestrel blocks the process, preventing one from conceiving.

How to use Levonorgestrel

Levonorgestrel should be taken orally as soon as possible after unprotected sex; the sooner it is taken, the more effective it is.
It is only effective up to 72 hours after sex. If it has been longer than this, you should not take Levonorgestrel; you should instead see your GP to discuss emergency contraception.
If you are sick or suffer from diarrhoea within 2 hours of taking Levonorgestrel, it may not have been absorbed and will not be effective. Take another dose as soon as possible.
Standard Dose: Take one 1500 microgram tablet as soon as possible within 72 hours after unprotected sex.
Double Dose: Women over 70kg (154 lbs) or those on certain medications may need a double dose.

Possible side effects

If you do experience side effects from Levonorgestrel, the most common can include:

Spotting
Breast tenderness
Abdominal pains
Nausea or sickness
Diarrhoea
Dizziness
Headaches

If you experience severe side effects, consult your healthcare provider.

Warnings and precautions

Some women feel sick after using Levonorgestrel. If this occurs, take a replacement tablet. You may also talk to your doctor about using different emergency contraception.
Nausea will not affect the effectiveness of Levonorgestrel.
You may experience a change of periods after taking Levonorgestrel.
The medication is only an emergency Pill and protects you once. Do not use it to replace regular contraceptives.
Some medicines can reduce the effectiveness of the Levonorgestrel pill. Consult your GP before taking the morning-after pill if you are on any medications.

What are the ingredients in Levonorgestrel?

Each Levonorgestrel tablet contains the active ingredient: 1.5mg of Levonorgestrel.

It also contains inactive ingredients: potato starch, maize starch, and colloidal silica anhydrous, magnesium stearate (E572), and talc (E533b), lactose monohydrate.

Frequently asked questions

Everything you need to know about Levonorgestrel before you start.

1. When should I take Levonorgestrel?

It should be taken within 72 hours (3 days) of unprotected sex. The earlier it is taken, the more effective it is.

2. Can Levonorgestrel cause infertility?

No, it does not affect long-term fertility, even when taken regularly.

3. Will it affect my periods?

It may cause your period to be earlier, later, or heavier than usual, but it does not stop your periods.

4. Can I take it while breastfeeding?

Yes, but your breast milk will contain some of the medication. You can reduce this by waiting 8 hours after taking the pill before breastfeeding.

5. Does it protect against STIs?

No, Levonorgestrel does not provide protection against sexually transmitted infections

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ICO Certified

Regulated by the MHRA

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Dr S. Bano
Dr Bano is a co-founder of SwiftDoctor. She is an experienced General Practitioner with a special interest in obesity management, medical education, and digital health. She qualified as a doctor from the University of Nottingham in 2011 and has since built a diverse and impactful career in both clinical and educational settings.
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Nasir Ali
Mr Nasir Ali is a co-founder and the Superintendent Pharmacist at SwiftDoctor. He is a highly experienced Advanced Clinical Practitioner. With extensive experience in primary care, he has worked across GP surgeries and digital health clinics, bringing a deep understanding of both face-to-face and virtual models of care.
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Jane Eastwood
I am a Registered Nurse with 23 years’ experience – I have worked extensively in New Zealand and in the UK and I currently work as an Advanced Clinical Practitioner in the General Practice setting and I have special interests in menopause, diabetes, general practice and the older adult.
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