About norethiste rone
Progestogen hormone medicine
Used for
- Treatment of heavy or irregular menstrual bleeding
- Delaying a period
- Treatment of endometriosis
Usual adult dose
Doses vary by condition; commonly 5 mg two or three times daily for several days. Endometriosis treatment may continue longer.
Common side effects
- Headache or migraine
- Nausea
- Breast tenderness
- Spotting or changes in bleeding
Important warnings
- Not a contraceptive; pregnancy should be excluded before treatment.
- Avoid with current or previous blood clots, severe liver disease, or hormone-sensitive cancers.
- Seek urgent care for chest pain, sudden breathlessness, or one-sided leg swelling.
- Smoking and other clot risk factors may increase risk.
Pregnancy
Do not use during pregnancy. Exclude pregnancy before starting treatment.
Breastfeeding
Norethisterone may pass into breast milk; use during breastfeeding requires clinical assessment.
Interactions
- Some seizure medicines, rifampicin, and herbal St John’s wort may reduce its effect.
- Some HIV or hepatitis medicines may alter its levels.
- It may affect diabetes medicines and blood glucose control.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.