Description
About Estradiol 4 mg (Estradiol Valerate)
Estradiol 4 mg is a prescription tablet containing 4 mg of estradiol valerate, made by Prontocure Pharma, used under specialist supervision when a higher estrogen dose is needed, for example to prepare the uterine lining during fertility treatment or in feminizing hormone therapy. It is twice the usual maximum daily dose for menopausal hormone replacement, so it is not a starting tablet and is not meant for routine treatment of hot flashes.
How does it work?
Estradiol valerate is an ester that the body converts to estradiol during absorption, and each 4 mg tablet yields about 3 mg of estradiol. In the uterus it makes the endometrium thicken and become receptive to an embryo; in feminizing therapy it promotes breast development and softer skin and, together with anti-androgen medicines, reduces the effects of testosterone. Blood levels at this dose are well above those of standard HRT, which is why monitoring matters.
Why 4 mg is not a menopause dose
Menopausal symptoms are usually controlled with 1 to 2 mg a day, and guidelines advise the lowest effective dose because the risks of clots, stroke and other estrogen-related harms rise with dose. If you are looking for HRT, ask about Progynova 1 mg or Estradiol 2 mg instead. Estradiol valerate is not a contraceptive at any strength.
Specialist uses
- Frozen embryo transfer: fertility clinics commonly prescribe 4 to 8 mg of estradiol valerate a day in divided doses, check the lining by ultrasound and then add progesterone. Schedules differ from clinic to clinic.
- Gender-affirming hormone therapy: oral estradiol in the range of about 2 to 6 mg a day is used for transgender women, with doses adjusted to blood estradiol and testosterone results.
These uses fall outside standard menopause labeling and must be planned and monitored by a qualified specialist.
How to take Estradiol 4 mg
Take the exact dose and timing your specialist sets, swallowed with water at regular intervals. Do not raise the dose on your own: more estrogen does not speed up results and adds to the risk of harm. If your regimen needs a half tablet, ask your pharmacist whether this tablet is scored. In a fertility cycle, never stop estrogen or progesterone abruptly without instructions from the clinic. Outside a fertility cycle, anyone with a uterus needs a progestin alongside estrogen to protect the endometrium.
Monitoring
Expect blood pressure checks and, depending on the reason for treatment, ultrasound scans, blood estradiol levels, liver tests, lipids or prolactin. Smoking sharply increases clot risk with oral estrogen at higher doses, so stopping smoking is strongly advised.
Safety warnings
Estrogen labeling carries boxed warnings about endometrial cancer with unopposed estrogen, and about stroke, deep vein thrombosis, pulmonary embolism, heart attack, breast cancer and probable dementia seen in large trials of menopausal hormone therapy. Your doctor may stop estrogen before major surgery or during long periods of immobility.
Who should not take it?
Do not take it if you have had a blood clot, stroke or heart attack, or if you have a clotting disorder, breast cancer or another estrogen-sensitive cancer, active liver disease, unexplained vaginal bleeding or porphyria. Estradiol is not used in pregnancy, except when a fertility clinic continues it in the first weeks after an embryo transfer. Uncontrolled high blood pressure, migraine with aura and smoking over age 35 need careful review first.
What are the side effects?
Nausea, breast tenderness or swelling, bloating, headache, mood changes, fluid retention and spotting are the most common. Go to the emergency room for chest pain, sudden breathlessness, a painful swollen leg, a sudden severe headache, weakness on one side, problems speaking or seeing, or yellowing of the eyes.
Interactions
Medicines that speed up liver enzymes, such as carbamazepine, phenytoin, rifampin and St. John’s wort, can reduce estradiol levels, and strong enzyme inhibitors may raise them. Tell your specialist about lamotrigine, thyroid hormone, blood thinners and any herbal products.
Pack sizes and storage
Supplied in strips of 10, in packs of 100, 200 or 400 tablets, from $70. Keep below 77°F (25°C), away from moisture, in the original strip.
Frequently asked questions
Can I take two 2 mg tablets instead?
Two Evadiol 2 mg tablets give the same total dose; your prescriber can say which option fits your schedule.
Will this strength work faster for hot flashes?
No. Menopausal symptoms respond to standard doses, and extra estrogen adds risk without extra benefit.
Where are other estrogen products?
See the More Product category.
This page is general information and not a treatment plan. Estradiol 4 mg is a prescription medicine for specialist-directed use only.