Start on the first day of your next period. This is ‘day one’ of your cycle, the day when b leeding starts

Take one pill each day and swallow the pill with water

You can take the pill at any time that suits you, but you must take it at about the same time each day

The pack is marked with the days of the week to help you remember to take your pills

Follow the direction of the arrows on the pack and take a pill every day until the pack is empty . When you finish the first pack, start a new pack on the next day. This means that you will be taking pills through your period

There must be no breaks between packs

For the first seven days of the first pack you should also use a condom, or a cap and spermicide

Do not take Noriday if you:

• are allergic to norethisterone or any of the other ingredients of this medicine 
• are or think you may be pregnant
• have had, or think you may have hormone-dependent cancer of the breast, cervix, vagina, or womb
• have or ever had acute or severe chronic liver disease including:
• past or present tumours
• jaundice (yellowing of the skin or eyes) and other types of jaundice such as Dubin-Johnson Syndrome and Rotor Syndrome
• active liver disease or liver tumours
• have had the following during pregnancy:
• pruritus (itching of the whole body)
• jaundice (yellowing of the skin and eyes) for which your doctor could not find a cause
• have disorders of lipid (fat) metabolism
• have unexplained vaginal bleeding
• have never had a period or suffer from lack of periods (amenorrhoea)
• have inflamed veins (thrombophlebitis)
• have thrombosis (blood clots)
• have heart disease, or you have had a stroke

Common or very common

Menstrual cycle irregularities

Uncommon

Breast tenderness

Frequency not known

Hepatic cancer

Thromboembolism

https://www.medicines.org.uk/emc/files/pil.1146.pdf