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Norethisterone Period Delay Treatment
Norethisterone is a man made and potent progestogen hormone which stops uterine
bleeding.
It also has some androgenic effects and some weak oestrogenic activity. Naturally
occurring progestogens are the hormones that maintain the lining of the uterus.
At the time before a period the level of progestogen hormone falls and this causes
the lining of the uterus to be shed as menstrual period. By taking Norethisterone
tablets the levels of progestogens is kept artificially high, and so the period
does not start.
For women who take a “fixed dose” combined oral contraceptive
pill, the same effect can be achieved by starting the next pack of the pill
immediately without the normal seven day break. Taking two packs “back to back”
in this way is safe if done occasionally. It is not advisable to link more than
two packs without allowing a period.
A similar approach can be taken by women on bi-phasic or tri-phasic contraceptive
pill by taking the last 'phase' of the pills from the second pack immediately after
finishing the first pack. Please consult your pharmacist if you are uncertain of
the type of contraceptive pill you are taking.
Norethisterone Side Effects
Like all medicines Norethisterone can cause side effects but these are rare If you
experience any of the following Norethisterone side effects you should stop taking
Norethisterone and contact your doctor immediately: Swelling of the face and wheezing
which may be caused by a severe allergic reaction, thrombosis (a blood clot in a
leg or the lungs), changes in liver function or jaundice (yellowing of skin and
whites of eyes), migraine, significant rise in blood pressure which may cause persistent
headaches.
Other side effects include breakthrough bleeding, breast changes, including breast
discomfort, ovarian cysts, changes in sex drive, pre-menstrual (pre-period) symptoms,
feeling sick or being sick, stomach ache, acne, allergic skin rashes, itching, discoloration
of the skin, swelling due to fluid retention, appetite changes, headache, dizziness,
depression, drowsiness, tiredness, sleeplessness, high blood sugar, fever, worsening
of vision in patients who are short sighted, minor eye changes which may cause difficulties
if you wear contact lenses.
You should consult the full list of side effects for Norethisterone on the patient
information leaflet provided with your treatment. Details of this can also be found here.