Norethisterone
Also sold as: Primolut N, Regestrone
Prescription neededFamily planning and hormones
Comes as:Tablet
Also sold as: Primolut N, Regestrone
Dose is set by your doctor. To delay a period: 5 mg three times a day starting 3 days before the expected period. For heavy bleeding: usually 5 mg two to three times a day for 10 days.
Your doctor may give you a different dose. Children's doses depend on weight.
Stop taking it and see a doctor straight away if you notice:
Medicines that can react with this one.
Carbamazepine lowers norethisterone levels and can make it less effective.
Rifampicin lowers norethisterone levels and can make it less effective.