Estradot
Is It Right for You?
A complete guide to Estradot — what it treats, how it works, dosages, side effects, and when a clinician may prescribe it following an online consultation.
What Is Estradot?
Estradot is a transdermal hormone replacement therapy (HRT) patch containing 17-beta estradiol — a bioidentical form of the naturally occurring oestrogen produced by the ovaries. It is applied to the skin twice weekly, delivering a continuous, controlled dose of oestrogen directly into the bloodstream via the skin, bypassing first-pass hepatic metabolism.
Estradot is available in four strengths: 25 micrograms/24 hours, 37.5 micrograms/24 hours, 50 micrograms/24 hours, and 75 micrograms/24 hours, and 100 micrograms/24 hours. As an oestrogen-only preparation, Estradot is suitable for women who have had a hysterectomy. Women with an intact uterus must use Estradot alongside a progestogen to protect the endometrium from oestrogen-induced hyperplasia and malignancy.
Estradot is a prescription-only medication in the UK. A licensed clinician must assess your menopausal symptoms, medical history, cardiovascular risk, and contraindications before it can be prescribed.
What Conditions Is Estradot Used For?
Estradot is indicated for:
relief of vasomotor symptoms including hot flushes, night sweats, and sleep disturbance caused by oestrogen deficiency
improvement in vaginal dryness, dyspareunia, and urinary symptoms associated with the menopause
reduction of postmenopausal bone loss and fracture risk in women at increased risk where other treatments are unsuitable
oestrogen replacement in women under 40 with premature menopause to protect bone density and cardiovascular health
Estradot effectively relieves the symptoms of oestrogen deficiency but does not prevent the natural progression of the menopause. HRT is reviewed regularly to ensure that the benefits continue to outweigh the risks for each individual patient.
How Does Estradot Work?
Estradiol is the principal and most biologically potent endogenous oestrogen. It exerts its effects by binding to oestrogen receptors (ERα and ERβ) found in a wide range of target tissues including the hypothalamus, uterus, vagina, bone, cardiovascular system, and skin.
Vasomotor symptom relief — declining oestrogen levels during the menopause lead to dysregulation of the hypothalamic thermoregulatory centre, producing hot flushes and night sweats. Oestrogen replacement re-establishes thermoregulatory stability, reducing the frequency and severity of vasomotor episodes.
Urogenital effects — oestrogen maintains the epithelial integrity and lubrication of the vaginal and urethral mucosa. Replacement therapy reverses atrophic changes and improves urogenital symptoms.
Bone protection — oestrogen inhibits osteoclast-mediated bone resorption by downregulating RANK-L signalling. Post-menopausal oestrogen deficiency accelerates bone loss; replacement attenuates this process and reduces fracture risk.
The transdermal route of administration is clinically significant: by avoiding hepatic first-pass metabolism, Estradot does not increase hepatic synthesis of clotting factors or C-reactive protein, resulting in a more favourable thrombotic and cardiovascular risk profile than oral oestrogen preparations.
Dosages & Administration
The correct dose depends on the type and severity of infection, age, weight, and kidney function. Always follow your clinician's instructions. The table below is for general reference only.
Administration Tips
Apply the patch twice weekly — every three to four days — to clean, dry, intact skin on the lower abdomen or buttocks. Avoid the breasts and waistline.
Rotate application sites with each patch change to reduce skin irritation. Do not apply to the same area on consecutive applications.
Press the patch firmly for approximately 10 seconds, ensuring full adhesion around the edges. If a patch partially detaches, press it back into place or apply a new patch.
If a patch falls off, apply a new one and continue to change on the original twice-weekly schedule.
Women with an intact uterus must use a progestogen alongside Estradot. Your clinician will prescribe an appropriate progestogen regimen (sequential or continuous).
Side Effects of Estradot
Most side effects are mild and resolve on their own. Serious side effects are rare but require immediate medical attention.
- Skin reactions at the application site — redness, itching, or mild irritation
- Breast tenderness or enlargement
- Headache
- Nausea
- Fluid retention / bloating
- Mood changes
- Breakthrough bleeding or spotting (particularly in the first three months)
- Leg cramps
- Venous thromboembolism (VTE) — deep vein thrombosis or pulmonary embolism; leg swelling, pain, breathlessness, chest pain
- Stroke — sudden severe headache, facial droop, arm weakness, speech disturbance
- Breast cancer — any new breast lump, skin changes, or nipple discharge; HRT is associated with a small increased risk
- Endometrial cancer — in women using oestrogen without adequate progestogen protection; irregular or heavy bleeding warrants urgent review
- Gallbladder disease — right upper quadrant pain, jaundice
All forms of combined (oestrogen plus progestogen) HRT are associated with a small increase in the risk of breast cancer with prolonged use. Oestrogen-only HRT (such as Estradot used without a progestogen in hysterectomised women) has a lesser or neutral effect on breast cancer risk. Risk returns towards baseline within several years of stopping HRT. The decision to use HRT should be made individually, balancing the benefits of symptom relief and bone protection against the individual risk profile.
Drug Interactions
Always disclose all prescription drugs, over-the-counter medicines, vitamins, and supplements to your clinician or pharmacist before starting Estradot
accelerate hepatic metabolism of estradiol, significantly reducing plasma levels and therapeutic efficacy. Dose adjustment or alternative treatment may be required.
oestrogens may increase ciclosporin plasma levels and risk of nephrotoxicity; monitor renal function.
HRT may alter anticoagulant requirements; monitor INR after initiating or changing HRT.
no clinically significant interaction with transdermal administration.
Important Warnings
Estradot used as oestrogen-only HRT must be combined with adequate progestogen therapy in women who have not had a hysterectomy. Unopposed oestrogen stimulation of the endometrium significantly increases the risk of endometrial hyperplasia and cancer.
Regular breast examination and participation in NHS breast screening is essential during HRT use. Any new breast changes should be reported to a clinician promptly.
Although the transdermal route carries a lower VTE risk than oral oestrogen, HRT should be used with caution in women with risk factors for thrombosis. It is contraindicated in women with a history of or current VTE unless they are receiving anticoagulation therapy under specialist supervision.
HRT is not indicated for the primary or secondary prevention of cardiovascular disease. It should be used with caution in women with cardiovascular risk factors.
Speak to a Clinician About Treatment
Getting advice no longer means sitting in a waiting room. Through The GP Service, you can consult with a licensed clinician in minutes — from home, on your lunch break, or wherever works for you. If treatment is clinically appropriate, your clinician can issue a prescription during the consultation. A consultation does not guarantee a prescription.
The treatment you need, when you need it.
Estradot FAQs
Transdermal estradiol avoids hepatic first-pass metabolism, resulting in a lower risk of venous thromboembolism and stroke compared to oral oestrogen. It is the preferred route for women with risk factors for thrombosis or cardiovascular disease.
Only if you have an intact uterus. Oestrogen used without progestogen stimulates the endometrial lining and significantly increases the risk of endometrial cancer. Women who have had a hysterectomy can safely use Estradot alone.
Many women notice improvement in vasomotor symptoms within two to four weeks of starting treatment, with maximum benefit developing over two to three months.
HRT should be used at the lowest effective dose for the shortest duration consistent with treatment goals. It is reviewed annually. There is no absolute maximum duration; the decision is individualised based on benefits and risks.
Yes — the patch is designed to remain adherent during bathing, showering, and swimming. Avoid prolonged soaking in very hot water. Pat the area dry rather than rubbing after bathing.