Norethisterone tablets belong to a group of medicines called progestogens. These work by acting on receptors in the body to mimic or exaggerate the effects of the natural hormone, progesterone.
Before a womans period is due there is a fall in the level of progestogen hormone in the body. When it falls below a certain level, the lining of the uterus is broken down and the period starts. Taking Norethisterone delays this until you stop taking the medication.
PLEASE NOTE: Norethisterone is not a contraceptive and will not prevent pregnancy.
Norethisterone 5mg tablets are to be taken three times a day to delay periods. The course should be started 4 to 5 days before a period is due and continued for as long as needed. A period bleed will normally start within 2 to 3 days of stopping the medication.
Women currently taking a contraceptive pill (both combined and progestrogen only) should not use norethisterone to delay their periods. Information about delaying periods whilst taking contraceptive pills or with Norethisterone can be found on the NHS Choices page How can I delay my period?.
If you forget to take the tablets
Do not take a double dose to make up for a forgotten dose. If you forget to take a dose take it as soon as you remember it and then take the next dose at the right time.
The most commonly reported side effects are bloating, breast tenderness, loss of libido, and stomach pains. Side effects are more likely if norethisterone is taken long term, rather than in a short course to delay periods.
Some women taking norethisterone experience fluid retention which can worsen a pre-existing migraine, epilepsy, blood pressure and asthma.
Very rarely, norethisterone may cause a severe allergic reaction which can in some cases be life-threatening. Sudden onset of some or all of the following require emergency treatment (very rare):
For a full list of side effects CLICK HERE
All women have a small chance of having a blood clot in the veins of the legs or in the lungs or other parts of the body. The risk of a having a clot is very slightly increased when taking norethisterone. The risk of having a clot is also increased with the folloing risk factors:
INTERACTIONS with other medicines
Patients should check with their doctors before taking norethisterone if taking any of the following.
|Norethisterone 5mg||90 Tablets (27 Day Delay)||
|Norethisterone 5mg||30 Tablets (7 day delay)||
|Norethisterone 5mg||60 Tablets (17 days max)||
Always read the patient information leaflet before commencing treatment.