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Norethisterone can cause side effects, although not everyone will experience them. The side effects are rare and include nausea and skin problems. If you suffer from asthma, epilepsy, migraines or heart or kidney problems, you may find your symptoms are worse while taking Norethisterone.
The contraceptive pill can be used to stop periods, but needs to be taken for at least a month beforehand. We recommend you speak to your doctor if you want to know about other options for managing your period, or if you are currently taking the contraceptive pill.
Always read the patient information leaflet before commencing treatment.
View patient information leaflet.Period delay tablets contain Norethisterone which is a form of progesterone, a female hormone, which prevents your uterus from getting rid of its lining as it usually does, when menstruation begins. It comes in the form of a tablet and the dosage strength to delay periods is 5 mg three times daily. You are required to start taking the tablet at least three days before your period is due and to continue taking it for the duration that you would like to delay your period.
The above is not an exhaustive list of medicines that interact with Norethisterone, and women should seek medical advice or speak to your pharmacist before taking the tablets.
It is recommended that Norethisterone 5mg tablets should be taken to delay your period for a maximum of 17 days. It is perfectly safe to delay your period for this amount of time. After you stop taking the tablets, your period is likely to start after two or three days, however the time scale may be different for every individual. This dose of Norethisterone is not recommended for prolonged use, as it can cause side effects and affect your hormone balance.
Norethisterone does not normally cause side effects as it is taken for such a short period of time. However, the most common side effects which some women may experience are rashes, itching, dizziness and headaches, nausea or depression. More serious side effects can include thrombosis or jaundice, fluid retention (which can lead to high blood pressure) and migraines.
Norethisterone cannot protect against pregnancy, as it is not a contraceptive. You may wish to consider taking the combined oral contraceptive pill to prevent pregnancy. The combined oral contraceptive can also be used to delay periods, when the ‘tablet free’ interval is omitted.
Some women may not observe their period a few days after they stop treatment with Norethisterone, but it may be slightly delayed whilst your body takes time to re-adjust to the hormone changes. However, it’s recommended to take a pregnancy test if you do not get your period within a week of ceasing treatment, to rule out the possibility of pregnancy. The period delay tablets are not a contraceptive and you should always use extra contraceptive methods during treatment. If you still do not observe your period, you should seek medical advice.
You can take one Norethisterone tablet three times a day, starting three days before you expect to start your next period. You should keep taking the tablets until you are ready to re-start your period (maximum treatment is 17 days).
Three days before your period is due, take one tablet three times daily. Norethisterone tablets can be used to delay a period for a maximum of 17 days and needs to be started 3 days before your period (a total of 20 days). Norethisterone should not be used to delay your period more than once every 6 months. Your period should occur 2-3 days after you have stopped taking the medicine.
Norethisterone period delay pills work in a similar way to the hormone progesterone, which occurs naturally in the body. It delays your period until the tablets are stopped. You will need to take one tablet three times a day, starting three days before your period is due to start and continuing for no more than 14 days afterwards (17 days in total). Your period will be delayed while you are taking the tablets and should start within three days of stopping the tablets.
Norethisterone 5mg tablets should be taken three times a day, usually at the same time each day. If you forget to take a tablet on one day, you may continue taking the regular dose on the following day, or when the next dose is due. Do not take two doses together. Read the patient information leaflet, as this will give you more information about the medicine.
Norethisterone will almost always delay your period when taken as advised. After you stop taking it, your period will return in 2-3 days. The majority of women will have no vaginal bleeding whilst taking Norethisterone although a small number may experience light bleeding.
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Such an easy way to get medication quickly. Superb service and quick delivery. I couldn't even get through to my Drs so although this costs a bit more it's infinitely quicker.
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This is a brilliant service and so quick and efficient. I would have had to wait god knows how long for a GP appointment for this medication.
Checked properly by a doctor before medication was prescribed and aftercare very good. Received yesterday kept up to date with the delivery and had to sign for which I like so there's no missing parcel. Highly recommended.
Trustworthy, professional and speedy delivery service. I have used this pharmacy a few times and I would recommend!

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Dr. Bryony Henderson is Medical Director for MedExpress UK, bringing extensive experience in clinical operations, governance and digital health. She has previously held roles dedicated to delivering safe, scalable care across well-known brands. She is a recognised clinical voice contributing to award-winning campaigns, publishing on health inequalities, and appearing across national media. Here, Bryony leads clinical governance and quality, supporting the delivery of safe, innovative and accessible healthcare.

Adedayo Titiloye is Superintendent Pharmacist responsible for the safe and compliant delivery of pharmacy services across MedExpress. He brings experience across community pharmacy and regional operations, including leadership roles within one of the UK’s largest independent pharmacy groups. Here, Ade focuses on building high-performing teams, improving processes and ensuring pharmacy services deliver safe, effective care at scale.

Dr. Carla Rodrigues is Head of Medical Operations at MedExpress, having previously held leadership roles in primary care networks and across well-known healthcare organisations, and has led scientific society groups in the field of sexual medicine. She has also completed training with MIT, Harvard and INSEAD. At HeliosX, Carla leads medical operations in the UK, overseeing the delivery of safe care pathways and upholding high standards in prescribing and clinical governance.

Dr. Kavir Matharu is a GP Lead at MedExpress, with 10 years’ experience across a range of healthcare settings. She is a practising GP with a background in complex healthcare consulting, having worked on high-level strategic and operational challenges within the health system. She was also selected for a leadership fellowship with the National Medical Director at NHS England. Kavir has a strong interest in healthcare leadership and system improvement, with a focus on high-quality, sustainable care.

Dr. Daryl Perera is a GP Lead at MedExpress, with experience across NHS primary care, urgent care and private practice. He has extensive experience in digital healthcare and clinical leadership, and oversees clinical governance and patient safety across our digital health services. His work spans urgent care and preventative medicine, with particular interests in men’s health, obesity management, and sport and exercise medicine. Daryl has worked across a range of NHS and private healthcare organisations and previously held a GP Director role.

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BSc (Hons), MSc, PhD
Dr. Sophie Dix is Head of Medical Affairs at MedExpress and a behavioural neuroscientist with over 25 years’ experience across the pharmaceutical industry, charity sector and health technology. Her work has focused on understanding how to manage and treat conditions affecting both mind and body, bringing together scientific insight with real-world care. Sophie is passionate about evidence and ensuring people have access to the right treatment at the right time.

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Dr. Zoe Lees is a Medical Writer at MedExpress, specialising in clear, evidence-based health communications. She completed her postgraduate research at the University of Glasgow, focusing on metabolic complications of pregnancy and the role of adipose tissue function. Zoe brings a strong scientific foundation to her work and is committed to delivering content that is both accurate and accessible, grounded in robust research.

Dr. Adam Abbs is Medical Director, International at MedExpress responsible for expanding the company into new markets. He has extensive experience in asynchronous and video consultations, technology-enabled remote examinations and home biomarker testing, with a particular interest in educating both patients and doctors. Adam is a published author and is licensed to practice medicine in the UK and across the EU, and is registered in Canada.

Liyya Patel is Deputy Chief Pharmacist at MedExpress UK, with over 10 years’ experience supporting the organisation’s growth and development. She is responsible for ensuring pharmacy services are safe, compliant and meet all regulatory standards, playing a key role in maintaining high-quality clinical care. Liyya previously worked in high-volume community pharmacy settings in Central London and is a qualified pharmacist and independent prescriber.

Dr. Olivia de Rougemont is a GP Lead at MedExpress with over 12 years’ experience across the NHS and private sectors. She has extensive experience in digital and in-person care, with a particular interest in women’s health, preventative medicine, and delivering patient-centred support that feels clear and accessible. Olivia also leads and mentors GPs, and brings a global perspective shaped by her experience working across different healthcare systems.