Norethisterone Dosage

Knowing how to take hormonal contraeptives like norethisterone and following them perfectly is crucial top get reliable and safe results.

Always read and understand the instructions that comes in the patient booklet and ask your pharmacist or doctor for any clarifications you need.

Norethisterone comes in blister packs containing 30 tablets each. It is to be taken 4 to 5 days before a period is due and can be continued for as long as necessary although it is not adviced to delay menstruation for more than 17 days.

It is important to inform your GP if you are taking the following medicines.
1. Medicines for high blood pressure
2. NSAIDs for treating inflammation and pain.
3. Ciclosporin for immune system suppression.
4. Aminoglutethimide usually prescribed for patients suffering from Cushing's syndrome.
5. St John's wort - a herbal preparation.
6. Anticancer medications.
7. Mediocines to treat HIV - nelfinavir, ritonavir
8. Tetracyclines, rifampicin, co-trimoxazole antibiotics
9. Carbamazepine, phenytoin - used to treat epilepsy

Norethisterone might increase risks of blood clots in the veins of women which are not uncommon in women who are not on norethisterone. Those at risk are women who are overweight, have a history of blood clots or repeated miscarriages.

UK regulated online doctor services

Structural Formula

norethisterone structure


norethisterone box