Few topics in women’s health have been as confusing as hormone replacement therapy. In 2002, early results from the Women’s Health Initiative (WHI) were reported in ways that frightened millions of women off treatment. In the two decades since, researchers re-analyzed the data and the picture became much more nuanced, especially regarding age and timing. In November 2025, the FDA announced it would remove the broad “black box” warning from menopausal hormone therapy products, reflecting that updated understanding.
This guide lays out what HRT is, its benefits, its risks, and the factors that help you and your clinician decide. It is not a substitute for individual medical advice.
What Is HRT?
Menopausal hormone therapy (MHT, commonly called HRT) replaces some of the hormones your ovaries stop making.
- Estrogen is the main ingredient that treats symptoms.
- A progestogen (progesterone or a progestin) is added for women who still have a uterus, because estrogen alone can thicken the uterine lining and raise the risk of endometrial cancer.
- Vaginal estrogen is a separate, very low-dose local treatment for vaginal dryness and urinary symptoms.
Ways to take it
- Transdermal (patch, gel, spray): absorbed through the skin. Evidence suggests transdermal estrogen carries a lower risk of blood clots than oral estrogen.
- Oral (tablets): convenient and effective, with slightly different risk profile.
- Progesterone options: oral micronized progesterone, combined patches, or a hormonal IUD.
- Vaginal (cream, tablet, ring): local therapy with minimal absorption into the bloodstream.
The Benefits of HRT
- Hot flashes and night sweats. HRT is the most effective treatment available for hot flashes and night sweats.
- Sleep. By reducing night sweats, it often improves sleep. See menopause insomnia.
- Bone protection. Estrogen prevents bone loss and reduces fracture risk. It is approved for osteoporosis prevention.
- Vaginal and urinary health. Systemic and especially vaginal estrogen treat dryness, painful sex and some urinary symptoms.
- Mood and quality of life. Many women report improvements in mood, irritability and overall wellbeing during perimenopause, though HRT is not an antidepressant.
- Joint aches and other symptoms. Some women find aches improve; evidence is less definitive. See menopause joint pain.
The Risks of HRT
Risks depend heavily on your age, time since menopause, health history, and the type and route of hormone.
- Blood clots and stroke. Oral estrogen increases the risk of venous blood clots and, to a smaller degree, stroke. Transdermal estrogen at standard doses appears to have lower clot risk.
- Breast cancer. Combined estrogen-plus-progestogen therapy is associated with a small increase in breast cancer risk that rises with longer use. In the WHI, estrogen-alone therapy (in women without a uterus) was not associated with increased breast cancer risk and was associated with a lower risk in that trial.
- Endometrial cancer. Raised with estrogen alone if you have a uterus, which is why a progestogen is added.
- Gallbladder disease. Slightly increased with oral estrogen.
- Side effects. Breast tenderness, bloating, headaches and irregular bleeding, especially when starting.
The timing window
The modern understanding, reflected in The Menopause Society‘s 2022 hormone therapy position statement, is that for healthy women under 60 or within 10 years of menopause, the benefits of HRT for bothersome symptoms and bone protection generally outweigh the risks. Starting HRT for the first time after 60 or more than 10 years after menopause carries more risk and requires more careful individual assessment.
Who Should Not Take HRT?
HRT is generally not recommended, or needs specialist input, if you have:
- A history of breast cancer or some other hormone-sensitive cancers
- Prior blood clots, stroke or heart attack
- Active liver disease
- Unexplained vaginal bleeding
- Certain clotting disorders
If HRT is not right for you, effective alternatives exist. See non-hormonal menopause treatments.
What About “Bioidentical” Hormones?
“Bioidentical” means a hormone chemically identical to what your body makes. Many FDA-approved products, such as estradiol patches and micronized progesterone, are bioidentical. Custom-compounded “bioidentical” hormones from compounding pharmacies are a different thing: they are not FDA-approved, their dosing can be inconsistent, and major medical societies do not recommend them over approved products for most women.
Pros and Cons at a Glance
Pros
- Most effective treatment for hot flashes and night sweats
- Prevents bone loss
- Treats vaginal dryness and painful sex
- Often improves sleep, mood and quality of life
- Many formulations to tailor treatment
Cons
- Small increased risks (clots with oral, breast cancer with longer combined therapy)
- Not suitable for everyone
- Possible side effects when starting
- Symptoms may return when stopping
How to Decide
Bring these questions to your clinician:
- How bothersome are my symptoms, and what have I tried?
- What is my personal risk of blood clots, heart disease and breast cancer?
- Would a transdermal route be better for me?
- Do I need a progestogen, and which one?
- How will we review the plan over time?
Our perimenopause symptoms checklist can help you document your symptoms first.
What Changed With the FDA Labeling
For two decades, estrogen products carried a prominent boxed warning based on early Women’s Health Initiative results. The WHI mainly studied women who were, on average, in their 60s and more than a decade past menopause, using oral conjugated estrogens with or without a specific progestin. Later analyses showed that risks and benefits differ by age and time since menopause, which is the basis for today’s “timing” guidance. The FDA’s November 2025 announcement to remove the broad boxed warning reflects that reassessment. It does not mean hormone therapy is risk-free; individual risk assessment still matters, and product labels continue to describe risks.
Choosing a Type: A Practical Comparison
- Estradiol patch: applied once or twice a week. Steady hormone levels and a lower blood clot risk than oral estrogen. Some people get skin irritation from the adhesive.
- Estradiol gel or spray: applied daily to the skin. Flexible dosing and a lower clot risk than oral. Needs to dry before contact with others.
- Oral estradiol or conjugated estrogens: a daily pill. Convenient and familiar, with a somewhat higher clot and gallbladder risk.
- Micronized progesterone: usually taken orally at bedtime because it can be mildly sedating. Often chosen for its favorable profile.
- Levonorgestrel IUD: protects the uterine lining locally for years and also provides contraception, which is useful in perimenopause.
- Vaginal estrogen (cream, tablet, ring): for genitourinary symptoms only; does not treat hot flashes.
Your clinician will consider your symptoms, history, preferences and cost when suggesting an option.
Starting HRT: What to Expect
- Timeline: many women notice fewer hot flashes within a few weeks, with fuller benefit by about three months.
- Early side effects: breast tenderness, bloating, headaches and irregular bleeding are common in the first few months and often settle. Persistent or heavy bleeding needs evaluation.
- Dose adjustments: it is normal to adjust the dose or route after a follow-up visit.
- Follow-up: a review at around three months, then usually annually, to check symptoms, side effects, blood pressure and whether the plan still fits.
Stopping HRT
There is no single right time to stop. Some women stop after a few years, others continue longer with periodic review. When stopping, symptoms can return. Options include tapering the dose gradually or stopping directly; studies have not shown a clear long-term difference in symptom return between the two, but some women prefer a gradual approach. Vaginal estrogen can usually be continued separately if needed.
Questions to Help You Weigh It Up
- How much are symptoms affecting my sleep, work, relationships and wellbeing?
- What are my personal risk factors, such as smoking, blood clot history, migraine with aura, high blood pressure or family history of breast cancer?
- Which route would minimize my risks?
- What would I try instead if HRT is not right for me?
Writing down your answers before an appointment can make the conversation faster and more focused.
Common Myths About HRT
- “HRT is only for hot flashes.” It also treats vaginal dryness and prevents bone loss.
- “You have to stop after five years.” There is no universal cut-off; decisions are individual and reviewed over time.
- “Compounded hormones are safer.” Custom-compounded products are not FDA-approved and are not considered safer than approved options.
- “HRT always causes weight gain.” Research has not shown this.
Frequently Asked Questions
Is HRT safe in 2026?
For most healthy women under 60 or within 10 years of menopause who have bothersome symptoms, major medical societies consider HRT a safe and reasonable option. “Safe” always means safe for you specifically, after discussing your history.
How long can I stay on HRT?
There is no universal cut-off. The Menopause Society recommends individualized decisions with periodic review rather than an arbitrary stop date.
Does HRT cause weight gain?
Studies have not shown that HRT causes weight gain. Midlife weight gain has many causes; see menopause weight gain.
Can I take HRT during perimenopause?
Yes. HRT can be used in perimenopause, sometimes combined with cycle management or contraception.
Does HRT help brain fog?
Some women report clearer thinking, particularly if better sleep follows, but HRT is not currently recommended solely to prevent cognitive decline. See menopause brain fog.
The Bottom Line
HRT is the most effective treatment for menopause symptoms, and for many women the benefits outweigh the risks, particularly when started before 60 or within 10 years of menopause. It is a personal decision, best made with a clinician who knows current guidance. Learn more in our complete menopause guide.
Sources: The Menopause Society (2022 Hormone Therapy Position Statement); U.S. Food and Drug Administration announcement on menopausal hormone therapy labeling, November 2025; American College of Obstetricians and Gynecologists; Mayo Clinic.
This article is for educational purposes only and is not medical advice. Talk with a qualified healthcare professional about your symptoms and treatment options. See our editorial standards.
