What should you know about the desogestrel pill?

Desogestrel is a progestogen. The pill mainly prevents ovulation and also thickens cervical mucus, making it harder for sperm to enter the womb. It does not protect against sexually transmitted infections.

Take one tablet every day, following the pack instructions, including when bleeding occurs. Bleeding may become less predictable, lighter, more frequent or absent. Headache, nausea, breast tenderness or mood changes can occur, but persistent or troubling effects deserve a review.

Take the tablet at a consistent time and use an alarm or reminder. If you vomit soon after taking it or have severe diarrhoea, ask a pharmacist or clinician whether you need another tablet or backup contraception. Medicines for epilepsy, tuberculosis, HIV and some herbal products can reduce contraceptive protection, so disclose every medicine you use.

If you miss a tablet or start a pack late, follow the leaflet for your exact product and use condoms if advised. A clinician can also discuss whether a combined pill is suitable or whether another method would fit your preferences.

Get urgent help for chest pain, difficulty breathing, coughing blood, a painful swollen leg, sudden severe headache, weakness or vision loss. Arrange a pregnancy test and prompt medical review for a late or unusual bleed with abdominal pain, or if pregnancy is possible.

Is desogestrel suitable with my medical history? What counts as a missed pill for my brand? Which medicines or supplements interact with it? What bleeding changes should I report?