What it is used for
- Delaying a period
- Heavy or painful periods
- Irregular menstrual bleeding
- Some symptoms of endometriosis
- As part of certain hormone therapy or contraception
How it works
It is a progestogen that acts on the womb lining and menstrual cycle. Depending on the use, it can hold off a period, control bleeding, or ease menstrual symptoms.
How it is taken
Taken as a tablet, with timing that depends on the reason for use (for example starting a few days before an expected period to delay it). Take it exactly as your doctor or pharmacist directs.
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
- Nausea
- Headache
- Breast tenderness
- Bloating
- Mood changes
- Spotting or changes in bleeding
- Reduced libido
Serious effects — get help
- Signs of a blood clot (painful swollen calf, sudden breathlessness, chest pain)
- Signs of a stroke
- Severe migraine with vision changes
- Yellowing of the skin or eyes
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
- Liver-enzyme-inducing medicines (some epilepsy and TB drugs, St John's Wort)
- Some HIV and hepatitis C medicines
- Tell your clinician about all medicines
Who should take care
- Standard contraceptive-dose use carries clot considerations; tell your clinician about clot history, smoking, migraines, or liver disease
- Not for use in pregnancy
- When used only to delay a period it is not a reliable contraceptive at those doses, so do not rely on it to prevent pregnancy
- Seek urgent help for clot or stroke symptoms