Traditional progestogen-only pill

This mini pill contains a progestogen without oestrogen. Its main action is to make cervical mucus thicker, which makes it harder for sperm to pass through the cervix. Depending on the product and the person taking it, it may also suppress ovulation and change the lining of the womb.

Bleeding may become lighter, more frequent, irregular or absent. Breast tenderness, nausea, headaches or mood changes can occur. These effects often need a review if they are troublesome, while severe symptoms need prompt advice.

Take one tablet at the same time each day and start the next pack without a break. The traditional type has a narrow time window, so follow the exact instructions supplied with your brand. Vomiting or severe diarrhoea can reduce absorption; check the leaflet for what to do.

If you take a tablet late or miss one, use the missed-pill instructions and consider condoms until protection is restored. Tell a pharmacist or clinician about other medicines and herbal products, because some can affect contraception.

Seek medical advice for persistent heavy bleeding, severe abdominal pain, a positive pregnancy test, or symptoms that suggest an allergic reaction. Sudden chest pain, breathlessness, leg swelling or a severe headache also need urgent assessment.

Ask whether this pill suits your health history, what counts as late for your specific brand, and what backup contraception to use after a missed tablet. Discuss how to manage troublesome bleeding and whether a different option would be more suitable.