About lynestrenol
Synthetic progestogen
Used for
- Heavy or irregular menstrual bleeding
- Endometriosis
- Delaying menstruation
- Certain menstrual-cycle disorders
Usual adult dose
Varies by condition; commonly 5–15 mg daily for several days or continuously, under medical supervision.
Common side effects
- Spotting or changes in menstrual bleeding
- Headache or dizziness
- Nausea or abdominal discomfort
- Breast tenderness or mood changes
Important warnings
- Avoid with unexplained vaginal bleeding, severe liver disease, or current or previous blood clots.
- Seek urgent care for chest pain, breathlessness, severe headache, or leg swelling.
- May affect glucose tolerance and fluid retention.
- Not a contraceptive when used for menstrual disorders.
Pregnancy
Do not use during pregnancy; treatment should be stopped if pregnancy occurs.
Breastfeeding
Use only when prescribed; lynestrenol can pass into breast milk, and suitability depends on the clinical situation.
Interactions
- Enzyme-inducing medicines such as rifampicin, carbamazepine, or phenytoin may reduce its effect.
- Some HIV medicines and St John’s wort may reduce its effect.
- It may alter the effects of diabetes medicines or anticoagulants.
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 It may be incomplete or out of date.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.