About ethinylestradiol
Synthetic estrogen hormone
Used for
- Combined hormonal contraception with a progestin
- Treatment of estrogen deficiency or menopausal symptoms
- Selected menstrual disorders, depending on the formulation
Usual adult dose
Varies by indication and combination; contraceptive tablets are usually taken once daily as directed.
Common side effects
- Nausea, headache, or breast tenderness
- Spotting or changes in menstrual bleeding
- Mood changes
- Fluid retention
Important warnings
- Can increase blood-clot risk, especially with smoking or clot history
- May increase stroke or heart-attack risk in some people
- Avoid in certain hormone-sensitive cancers or unexplained vaginal bleeding
- Seek urgent care for chest pain, breathlessness, or one-sided leg swelling
Pregnancy
Not used during pregnancy; discontinue if pregnancy is confirmed.
Breastfeeding
Estrogen may reduce milk supply, especially soon after birth; suitability depends on timing and formulation.
Interactions
- Enzyme-inducing medicines, including rifampicin and some seizure medicines, may reduce effectiveness
- Some HIV or hepatitis medicines may alter hormone levels
- St John's wort may reduce effectiveness
- May affect levels of lamotrigine and some other medicines
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 It may be incomplete or out of date.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.