What it is used for
- Preventing pregnancy
- Contraception when estrogen is not suitable (e.g. while breastfeeding, smokers over 35, or those at higher clot risk)
How it works
It contains only a progestogen hormone. Depending on the type, it thickens cervical mucus to block sperm, thins the womb lining, and may stop the ovaries releasing an egg.
How it is taken
Taken as a daily tablet, usually every day without a hormone-free break. Some types must be taken within a strict daily time window. Take it exactly as your doctor, pharmacist, or the label directs, and ask what to do if you take it late or miss a dose.
No doses here on purpose. The right strength and schedule depend on you — only a doctor or pharmacist should set them. Always follow your prescription and the label.
Common side effects
- Irregular bleeding or spotting
- Periods stopping altogether
- Headache
- Breast tenderness
- Acne
- Mood changes
- Small ovarian cysts that usually clear on their own
Serious effects — get help
- Severe lower abdominal pain (which can rarely signal an ectopic pregnancy)
- Signs of a serious allergic reaction
- Yellowing of skin or eyes
- A new breast lump that needs prompt assessment
If a reaction is severe — for example trouble breathing, swelling of the face or throat, or collapse — go to the nearest emergency room now or call your local emergency number. Do not wait for an online consultation.
Interactions to watch
- Some epilepsy medicines
- Certain HIV and hepatitis C medicines
- Tuberculosis antibiotics (rifampicin-type)
- St John's Wort
- Other liver-enzyme-inducing medicines can reduce its reliability
Who should take care
- Tell your clinician about any history of breast cancer, liver disease, or unexplained vaginal bleeding
- Often suitable while breastfeeding, but confirm with your clinician
- If a period is very late or you have severe one-sided abdominal pain, seek urgent assessment to rule out ectopic pregnancy
- Does not protect against STIs