How to delay your period for a holiday
Norethisterone can delay your period by up to 17 days. When to start taking it, how it works, side effects and who should avoid taking it.
Yes, you can safely postpone a period for a holiday, wedding, exam or big event — but the method depends on your situation. If you are not on the combined pill, the standard option is norethisterone: one 5 mg tablet three times a day, started three days before your period is due and continued until you are ready to bleed, for up to 17 days of delay. If you already take the combined pill, you do not need norethisterone at all — running two packs together does the same job.
How does norethisterone delay a period?
A period happens when levels of progesterone fall at the end of your cycle, telling the womb lining to shed. Norethisterone is a synthetic version of that hormone: by keeping levels topped up, it tells the lining to stay put. While you keep taking the tablets, the bleed is postponed; once you stop, your period normally arrives within two to three days.
When do I start taking it — and what if I mistime it?
Timing is the part people most often get wrong. Start three days before the date your period is expected, which means you need a reasonable idea of your cycle. If your cycles are irregular, count from your shortest recent cycle so you start early rather than late. Starting on the day your period is due, or once spotting has begun, is usually too late — the shedding process has already started. Plan backwards from your travel dates and request the tablets in good time rather than at the airport.
What if I'm on the combined pill?
Run your packs back to back. With most combined pills you simply skip the seven-day break (or discard the placebo tablets) and start the next pack immediately; with everyday-style packs, check which tablets are active first. This is safe, endorsed by UK family-planning guidance, and avoids adding another hormone on top of your contraception. Note that this trick belongs to the combined pill only — the progestogen-only mini-pill runs continuously with no scheduled bleed, so there is nothing to skip, and norethisterone is not routinely added alongside it.
Does norethisterone work as contraception?
No — and this catches people out every year. Period-delay norethisterone is not a contraceptive, and because it is a hormone, it should not be combined casually with hormonal contraception either. If you are relying on condoms or fertility awareness, keep using them throughout. If there is any chance you could already be pregnant, do not start norethisterone: take a test first.
What are the side effects?
Most women taking norethisterone for a couple of weeks notice little, but bloating, breast tenderness, headaches, mood changes, acne and light spotting are all recognised. Spotting towards the end of a long delay is common and does not mean the tablets have failed. Side effects settle once you stop and your period arrives.
Who shouldn't take it?
Norethisterone is partly converted in the body to an oestrogen-like substance, so it is avoided in women with a personal history of blood clots (DVT or pulmonary embolism), a strong clotting risk — including some women with severe obesity, recent major surgery or long-haul immobility — certain cancers, significant liver disease, or unexplained vaginal bleeding, and it is not used in pregnancy. This is exactly why a short medical questionnaire comes before a prescription: the check takes minutes and screens out the situations where the risk is not worth a postponed bleed.
Practical tips for travelling
Take enough tablets for the full delay plus a couple of days, keep them in hand luggage, and space the three daily doses roughly evenly — with time-zone changes, anchor them to meals rather than the clock at home. Expect your period two to three days after the last tablet, and pack supplies for it. Your following cycle may run slightly long or short before settling back to normal, so do not be alarmed if the next period is not exactly on schedule. If you get migraine around your period, be aware that shifting the bleed can shift those headaches too — our guide to migraine treatments covers how to handle an attack well.
Frequently asked questions
How long can I delay my period?
Up to 17 days with a standard norethisterone course. Most people plan around one to two weeks. It is intended as an occasional tool, not a way to switch periods off long term — if you want fewer periods generally, talk to a clinician about contraceptive options designed for that.
Will it mess up my cycle afterwards?
Your period normally arrives two to three days after stopping, and the next cycle or two may shift slightly before returning to your usual pattern. There is no lasting effect on fertility.
Can I use norethisterone every month?
Occasional use is fine; monthly use is not the right tool. If you dread every period because of pain, heaviness or timing, a review of longer-term options will serve you far better.
What happens if I miss a dose?
Take it as soon as you remember. Missing doses — especially several — lets hormone levels dip, and spotting or a full bleed can follow. Three evenly spaced doses a day gives the most reliable hold.
If a period is due at exactly the wrong moment, you can check your eligibility for period delay treatment online. A UK prescriber reviews every consultation, checks the safety points above, and tablets can be arranged in time for your trip.
Related reading
This guide is for general information and is not a substitute for personalised medical advice. Speak to your GP, pharmacist or prescriber about what is right for you.
More clinically reviewed articles: all health guides.