How to prescribe HRT for a 47 year old woman with 6 months of amenorrhea.
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hormone replacement therapy menopause prescribing guidelines
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Prescribing HRT for a 47-Year-Old with 6 Months of Amenorrhea
Step 1 — Establish the Diagnosis
A 47-year-old with 6 months of amenorrhea is perimenopausal, not yet postmenopausal. The formal definition of menopause is 12 consecutive months of amenorrhea after age 40 in the absence of other causes. At 6 months, she is in the perimenopause (the transitional period before, during, and after cessation of menstruation).
Before starting HRT, exclude other causes of amenorrhea: pregnancy, thyroid disease, hyperprolactinaemia, and premature ovarian insufficiency (if < 40 years).
Step 2 — Assess Indications and Rule Out Contraindications
Indications (she likely has some of these):
- Vasomotor symptoms (hot flushes, night sweats)
- Sleep disturbance, mood changes
- Genitourinary syndrome of menopause (vaginal dryness, dyspareunia)
- Osteoporosis prevention
Contraindications to HRT:
| Absolute | Precautions |
|---|---|
| Oestrogen-dependent malignant tumours | Symptomatic fibroids |
| Undiagnosed vaginal bleeding | Untreated hypertension |
| Pregnancy | Migraine with aura |
| Active liver disease with abnormal LFTs | Epilepsy (lamotrigine interaction) |
| Active/recent thromboembolic disorder (MI, angina) | Endometriosis |
| Active or idiopathic untreated VTE | VTE/stroke history |
| Untreated endometrial hyperplasia | Heart disease |
Step 3 — Choose the Correct Regimen
Because she still has a uterus and is perimenopausal, she requires:
Sequential combined HRT — oestrogen continuously + progestogen for 12–14 days per cycle (luteal phase cover to protect the endometrium).
Continuous combined HRT (oestrogen + progestogen every day) is used only after confirmed menopause (≥12 months amenorrhoea) — using it too early causes irregular bleeding.
Step 4 — Prescribe (with doses)
Always prescribe by brand name to avoid confusion between formulations.
Oestrogen options (choose one):
| Route | Product | Dose |
|---|---|---|
| Transdermal patch (preferred) | Estradiol patch | 25–100 mcg twice weekly |
| Gel | Estradiol gel 0.6 mg/g (e.g. Oestrogel) | 1–4 pumps daily |
| Gel sachets | Estradiol gel sachets | 0.5–1.5 mg daily |
| Spray | Estradiol 1.53 mg/spray (e.g. Lenzetto) | 1–3 sprays daily |
| Oral | Estradiol hemihydrate/valerate tablets | 1–2 mg daily |
Transdermal oestrogen is preferred over oral when there is increased risk of VTE or stroke, as oral oestrogen carries a small but real increase in thrombotic risk.
Progestogen options (for days 15–28 of cycle):
| Drug | Dose & Timing |
|---|---|
| Micronised progesterone (Utrogestan) — preferred | 200 mg every night, days 15–28 |
| Medroxyprogesterone acetate | 10 mg once daily, days 16–27 |
| Levonorgestrel 52 mg IUD (Mirena) | Inserted; provides continuous progestogen cover |
Micronised progesterone (body-identical) is preferred — associated with lower breast cancer and VTE risk compared to synthetic progestogens.
Ready-made combined sequential products (simpler):
- Estradiol 1–2 mg / dydrogesterone 10 mg tablets — calendar pack, 1 daily
- Estradiol 1–2 mg / norethisterone 1 mg tablets — calendar pack, 1 daily
- Combined patch: estradiol 50 mcg patch (14 days) + estradiol/norethisterone acetate patch (14 days), applied twice weekly
Step 5 — Consider Add-ons
Local vaginal oestrogen (for genitourinary symptoms — safe even with systemic HRT):
- Estradiol 10 mcg vaginal tablets
- Estriol vaginal cream 0.1%
- Vaginal ring
Testosterone (consider if libido/energy is a concern despite adequate oestrogen): testosterone gel used off-label.
Step 6 — Counsel on Risks
| Risk | Detail |
|---|---|
| Breast cancer | Small increased risk for women >50 on combined HRT; body-identical progesterone may carry lower risk. Counsel using patient decision aids (e.g. Women's Health Concern) |
| Endometrial cancer | Prevented by adequate progestogen cover — ensure 12–14 days/month minimum |
| VTE/clot | Oral oestrogen increases risk; transdermal does not meaningfully increase it |
| Irregular bleeding | Expected in perimenopause on sequential HRT; refer if unexpected/heavy |
| Cardiovascular | HRT started early (< 60 years or within 10 years of menopause) is not associated with excess cardiovascular risk — the "timing hypothesis" |
Practical Starting Approach
A reasonable first prescription for this woman:
- Oestrogen: Estradiol transdermal gel 0.75 mg (1 pump of Oestrogel) daily — start low, titrate up based on symptom control
- Progestogen: Micronised progesterone (Utrogestan) 200 mg every night, days 15–28 of each calendar month
- Review at 3 months: assess symptom response, bleeding pattern, BP, and tolerance
- Adjust oestrogen dose upward if symptoms persist; reassess annually for continued need
— The Maudsley Prescribing Guidelines in Psychiatry, 15th ed., pp. 884–886 (Chapter 10: Menopause, HRT products and regimens)
⚠️ Recent evidence note: A 2026 systematic review (PMID 41808362) confirms a small increased incidence risk of breast cancer with menopausal hormone therapy — consistent with existing guidance to counsel patients individually, weigh benefits vs. risks, and use the lowest effective dose for the shortest necessary duration.
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