HRT Side Effects: What's Normal, What's Not, and When to Call a Doctor

The HRT Index is an independent comparison resource for HRT telehealth providers. This page is educational and isn't a substitute for advice from your own clinician. · Last verified: June 15, 2026.

Your symptom in 10 seconds: track it, call, or go now

This quick-reference table sorts the most common HRT symptoms into three buckets: things that are usually a normal adjustment, things worth a non-urgent call to your clinician, and things that need same-day or emergency care. It is a starting point for triage, not a diagnosis. When a symptom is sudden, severe, or one-sided, treat it as urgent regardless of where it lands below.

What are the most common HRT side effects?

The most common HRT side effects are breast tenderness, headaches, nausea, bloating or fluid retention, spotting or irregular bleeding, mood changes, and skin changes like acne — plus patch-site irritation if you use a patch. Most are mild and ease within a few weeks to about three months as your body adjusts to the hormones. Persistent, severe, or unusual symptoms should be reviewed with a clinician rather than pushed through.

Most early side effects come from your body recalibrating, not from something going wrong. When you add estrogen and (usually) a progestogen back into the system, tissues that have receptors for those hormones — your breasts, your uterine lining, your gut, your brain — all react at once. That reaction usually quiets down.

Knowing which hormone tends to cause what is often the exact lever your clinician will adjust — the difference between quitting and fixing.

That estrogen-versus-progestogen split is why “HRT side effects” is never one answer. If your main problem is mood or drowsiness, the progestogenis often the lever. If it's nausea or breast tenderness, the estrogendose or route may be. A generic side-effect list can't tell you that — and it's the whole reason most “I think I have to quit” moments are actually “my plan needs a tweak” moments.

Sources: NHS HRT side-effect guidance; MedlinePlus estrogen/progestin information; Cleveland Clinic; Mayo Clinic.

Which HRT side effects are red flags — and when do you call versus wait?

A few symptoms should never be treated as normal HRT “adjustment.” Seek urgent care for sudden severe headache, vision loss or double vision, speech trouble, weakness or numbness on one side, chest pain or heaviness, sudden shortness of breath, coughing up blood, or one-sided leg pain, redness, or swelling — these can signal a blood clot or stroke. Heavy bleeding, bleeding after menopause, or a new breast lump also need prompt medical attention. When in doubt, the safe move is urgent.

HRT is not side-effect-free, and “just push through it” is the wrong instinct for the symptoms that matter. Most side effects are harmless and fade. A small number are warning signs. The skill — the thing this whole page is built to give you — is telling those two groups apart.

Red flags that may mean a clot, stroke, or heart problem — get help now

Red flags involving bleeding or your breasts — call promptly

• Heavy bleeding
• Any bleeding after menopause
• Bleeding that starts after you'd been stable for months
• A new breast lump, nipple discharge, skin dimpling, or other new breast change

Signs of a serious allergic reaction — emergency care

• Swelling of the face, lips, tongue, or throat
• Trouble breathing or swallowing
• Widespread hives or severe rash

None of this means HRT is dangerous for you specifically. Blood clots and strokes on HRT are uncommon, and your personal risk depends heavily on your route, your dose, and your health history (all covered below). But these symptoms are worth knowing cold, because acting fast is what makes them survivable.

How long do HRT side effects last?

Most mild HRT side effects improve within a few weeks to about three months as your body adjusts. Irregular spotting or breakthrough bleeding can take longer — often settling within three to six months — but heavy, persistent, new, or post-menopausal bleeding should always be checked. If symptoms are severe, or they haven't eased by around the 12-week mark, that's a reason to review your dose or formulation, not necessarily a reason to stop.

Most “should I quit?” moments happen around month three — and most are solvable with a tweak, not a stop. One honest caveat: timelines vary a lot. Some people sail through with no side effects at all. Others need two or three adjustments to land on the right plan. Neither means you're doing it wrong.

Sources: NHS; Mayo Clinic; menopause-clinic and telehealth clinical guidance.

Is bleeding on HRT normal?

Spotting or irregular bleeding is common when you start or change HRT, especially in the first three to six months, as your uterine lining responds to the hormones. But bleeding is not something to ignore indefinitely. Heavy bleeding, bleeding after menopause, bleeding that persists past the expected window, or bleeding that starts after you'd been stable should be evaluated by a clinician. The reason: while most causes are benign, unexpected bleeding is also how problems with the uterine lining first show up.

Why it happens early. Your endometrium (the lining of the uterus) is sensitive to estrogen and progestogen. When you start HRT, change your dose, or switch between a continuous regimen (steady hormones, aiming for no bleed) and a cyclical one (hormones timed to produce a scheduled bleed), the lining adjusts — and that can mean spotting. Missing doses can trigger it too.

When bleeding needs a closer look

• It's heavy
• It happens after menopause (your periods had fully stopped)
• It comes with pain, dizziness, or faintness
• It starts after months of stability
• It keeps going past the expected three-to-six-month settling window

Questions worth asking your clinician about bleeding

• Do I still have a uterus, and am I on enough progestogen to protect the lining?
• Is my HRT continuous or cyclical — and is this bleeding expected for that type?
• Do I need an ultrasound, exam, or evaluation of the lining?
• Should my dose, route, or schedule change?

The bottom line: early spotting is usually nothing. Post-menopausal bleeding is always worth a call. When you're not sure which you're having, ask.

Sources: NHS; MedlinePlus; FDA menopause guidance.

Do HRT side effects depend on the estrogen, the progesterone, or the delivery method?

Yes — and this is the most useful thing to understand about HRT side effects. Your risk profile changes based on whether your therapy is estrogen-only or combined, whether it's whole-body (systemic) or local (vaginal), whether your estrogen is oral or transdermal (through the skin), your dose, your age, and how long it's been since menopause. The clearest, best-documented example: oral estrogen carries a higher blood-clot risk, while transdermal estrogen (patch, gel, or spray) does not show the same increase, because it skips the liver's first-pass metabolism.

Oral vs. transdermal estrogen: the clot difference

This is the single most important route distinction. “Transdermal” simply means absorbed through the skin — a patch, gel, or spray — instead of swallowed.

• Oral estrogen passes through your liver before it reaches the rest of your body. That first pass nudges up the production of clotting factors. In pooled data, oral estrogen users have a blood-clot (VTE — venous thromboembolism) risk of roughly 1.5 times that of non-users.
• Transdermal estrogen is absorbed through the skin and largely bypasses that first liver pass. In the same body of research, transdermal estradiol showed no meaningful increase in clot risk versus non-users (relative risk close to 1.0).
• Head to head, one meta-analysis of 15 observational studies found oral estrogen carried a higher risk of a first blood clot than transdermal — relative risk 1.63 — and roughly double the risk of a deep-vein clot (relative risk 2.09). NICE states plainly that transdermal HRT does not increase clot risk, while oral HRT does.

In plain terms: if blood clots are your worry, the patch or gel is generally the lower-risk route, and it's worth asking your clinician about directly. This is one of the most actionable facts in all of HRT.

Estrogen-only vs. combined HRT

• If you've had a hysterectomy (no uterus), estrogen alone is often used.
• If you still have a uterus, a progestogen is generally added, because estrogen on its own thickens the uterine lining and raises the risk of endometrial cancer over time. The progestogen protects that lining — this isn't optional.

Systemic vs. vaginal estrogen

• Systemic HRT (pills, patches, gels) treats whole-body symptoms like hot flashes, night sweats, and mood and sleep changes.
• Low-dose vaginal estrogen(cream, tablet, or ring) mainly treats local vaginal and urinary symptoms — dryness, discomfort, recurrent UTIs. It delivers a much smaller amount of estrogen to the bloodstream, so it shouldn't be lumped in with systemic HRT when you're weighing whole-body risks. Different tools for different jobs.

Age and timing

• For many healthy women who start HRT under 60, or within 10 years of menopause, the benefits tend to outweigh the risks.
• Starting later, or more than a decade past menopause, shifts that balance. The honest framing: risks and benefits are individual, and timing is part of the math.

Sources: JCEM meta-analysis (Mohammed et al., 2015) on oral vs. transdermal estrogen and vascular events; NICE 2024 guidance via NCBI evidence review; The Menopause Society / BMS-IMS statements; MedlinePlus; Mayo Clinic.

Can HRT cause weight gain, bloating, mood changes, hair loss, or acne?

HRT can be associated with bloating, fluid retention, mood changes, acne, and hair changes, but the evidence does not strongly support HRT causing meaningful weight gain on its own. Menopause itself changes body composition, sleep, and metabolism, so it's easy to blame HRT for shifts that would have happened anyway. The most reliable approach is to track your symptoms against your start date, dose changes, and other factors like sleep, stress, and medications, then review the pattern with your clinician.

Weight gain.Studies don't show HRT reliably causes weight gain. What istrue is that early bloating and fluid retention can feel like weight gain in the first few weeks (it usually settles), and that menopause itself — independent of HRT — tends to shift weight and body composition. If weight is changing and bothering you, it's worth raising, along with thyroid, sleep, activity, and other meds.

Bloating. Fluid retention can happen, especially early. Persistent or severe swelling deserves a review — and remember: swelling in one leg is a different, urgent issue (see the red-flag section).

Anxiety, low mood, depression. Mood changes are a recognized side effect, and for some people the progestogen's type, dose, or timing is the driver. This is fixable for many — but severe symptoms, and especially any thoughts of self-harm, need prompt clinical help, not a wait-and-see.

Acne and hair changes.Skin changes and acne can occur. Hair loss is listed by the NHS among possible estrogen-related effects. Both are worth mentioning at a review if they're significant.

The throughline: don't assume HRT is the only suspect, and don't suffer in silence. Track the timing, bring the pattern, ask for an adjustment.

Sources: MedlinePlus; NHS.

Does HRT cause breast cancer, clots, or stroke? The serious risks, by the numbers

The serious risks of HRT — breast cancer, blood clots, stroke — are real but, for most healthy women who start near menopause, low in absolute terms, and they vary sharply by the type of HRT. Estrogen-only HRT shows little or no increase in breast-cancer risk (and long-term Women's Health Initiative follow-up even found a lower risk after hysterectomy). Combined estrogen-plus-progestogen HRT carries a small increase that grows with longer use, and the type of progestogen matters. Clot and stroke risk is tied mainly to oral (versus transdermal) estrogen.

Numbers calm nerves better than adjectives, so here's the honest breakdown.

Breast cancer

• Estrogen-only HRT(for women without a uterus): little to no increase in breast-cancer risk. In the long-term (≈20-year) follow-up of the Women's Health Initiative, estrogen-alone use after hysterectomy was actually associated with a lower breast-cancer risk.
• Combined HRT (estrogen + progestogen): a small increase in risk that rises the longer you use it. Synthetic progestins (like medroxyprogesterone acetate) carry a higher signal in the research than micronized progesterone, which appears more neutral over shorter durations.
• Absolute risk stays low, especially for women in their 50s, and is lowest when HRT is started under 60 or within 10 years of menopause.

See our deeper dive: HRT and breast cancer risk — the 2026 update.

Blood clots (VTE) and stroke

• Driven largely by route. Oral estrogen raises clot risk (≈1.5× non-users in pooled data); transdermal estrogen shows no meaningful increase.
• This is why “is HRT safe?” has no single answer — a transdermal patch and an oral pill are not the same risk conversation.

Endometrial (uterine) cancer

• Estrogen without a progestogen, in someone who still has a uterus, raises endometrial-cancer risk over time. Adding a progestogen is what protects against this — the entire reason combined HRT exists.

The takeaway isn't “HRT is dangerous” or “HRT is harmless.” It's that your personal risk depends on which HRT, which route, your age, your timing, and your history — a conversation worth having with specifics, not fear.

Sources: American Cancer Society (2026); Breast Cancer Research Foundation; International Menopause Society; WHI long-term follow-up; JCEM meta-analysis.

Who should avoid HRT, or get extra medical review first?

HRT isn't right for everyone. The FDA lists situations where menopausal hormone therapy generally should not be used, including pregnancy, unexplained vaginal bleeding, certain cancers (such as breast or other hormone-sensitive cancers), a history of stroke or heart attack, blood clots or a clotting disorder, and liver disease. Other factors — like age over 60, more than 10 years past menopause, smoking, or migraine with aura — don't automatically rule HRT out, but they do mean your risk needs an individual review before you start.

We'd rather tell you the truth than sell you something that isn't safe for you.

Conditions that may make HRT inappropriate

A clinician should weigh these carefully:

• Unexplained vaginal bleeding
• A personal history of breast cancer or another hormone-sensitive cancer
• Endometrial (uterine) cancer
• Blood clots (DVT or pulmonary embolism) or a clotting disorder
• A history of stroke or heart attack
• Liver disease
• Pregnancy
• Untreated high blood pressure

Risk factors that change the conversation

HRT may still be an option, often with a transdermal route and careful review:

• Age over 60, or more than 10 years since menopause
• Smoking (the FDA notes that smoking while taking estrogen/progestin increases the risk of serious effects like blood clots and stroke)
• Migraine with aura
• High blood pressure or high cholesterol
• A family or personal history of certain cancers
• Gallbladder disease
• Other medications that may interact

If you're in the first group, HRT may not be your path — and that's important to know early. If you're in the second group, you're not disqualified; you're someone who needs a careful clinician and probably a route chosen with your risk in mind. Read our full guide: HRT contraindications — who should not take hormone replacement therapy.

Sources: FDA menopause guidance; MedlinePlus; Mayo Clinic; Cleveland Clinic.

How can you lower your chance of HRT side effects?

You can't eliminate every HRT side effect, but you can reduce avoidable risk by matching the product, route, and dose to your health history, and by reviewing your plan regularly. The FDA and Mayo Clinic both emphasize using the lowest dose that controls your symptoms for an appropriate length of time, with regular check-ins. Choosing a transdermal route over oral when clot risk is a concern, and not adjusting your own dose without guidance, are two of the highest-leverage moves.

Use the lowest effective dose.Not “the lowest dose possible no matter what” — the lowest dose that actually controls your symptoms.

Choose the route that fits your risk.Pills, patches, gels, sprays, creams, and vaginal options are not interchangeable. Route affects side effects, convenience, whether you'll remember to use it, and — for clots — your actual risk.

Review regularly.MedlinePlus notes your doctor should check in every 3 to 6 months to see whether you still need the medication and whether anything should change. HRT is a “set it and reviewit” treatment, not “set it and forget it.”

Don't self-adjust out of fear.This is the big one. A lot of “I'm about to quit” posts are really “no one told me this was normal, and I panicked.” The safe move when side effects worry you is to contact the clinician who prescribed it — because most issues are solved by changing the dose, route, timing, or progestogen, not by stopping cold.

Which raises a fair question: what if the hard part is having a clinician who actually picks up the phone and helps you adjust?That's the whole reason the right provider matters so much for side effects — and it's exactly what we compare below.

Sources: FDA; Mayo Clinic; MedlinePlus.

Are compounded or “bioidentical” HRT side effects different?

“Bioidentical” does not automatically mean safer, and compounded hormones are not the same as FDA-approved hormone therapy. The FDA has stated it does not have evidence that compounded bioidentical hormone therapies are safe and effective, or safer or more effective, than FDA-approved hormone therapy — and FDA-approved hormone options are available. Compounded products are mixed by a pharmacy and are not individually reviewed by the FDA for safety, effectiveness, or consistent dosing.

Two terms, because they get blurred on purpose:

• “Bioidentical”means a hormone with the same molecular structure as the ones your body makes (like estradiol and progesterone). Here's the catch: several FDA-approved products are already bioidentical. Bioidentical and FDA-approved are not opposites. Some telehealth brands imply “bioidentical = natural = safer,” but that's a marketing frame, not a medical fact.
• “Compounded”means custom-mixed by a compounding pharmacy rather than manufactured as an FDA-approved finished drug. Compounding has legitimate uses — for example, when someone has an allergy or needs a form that's not commercially available. But a compounded product has not been through FDA review for safety, effectiveness, or dose consistency.

This matters when you compare telehealth providers, because their formulation choices differ. Some prescribe FDA-approved hormone products. Some offer both FDA-approved and compounded options (Winona, for example, lists FDA-approved patches, tablets, and progesterone capsules alongside compounded creams). Others build their whole offering around a compoundedformulation (Inner Balance's Oestra). None of those is automatically wrong — but it's a fact you should know before you choose.

Questions to ask before using any compounded HRT

• Is this an FDA-approved product or a compounded one?
• Which pharmacy prepares it, and is it accredited?
• What's the exact formulation and dose?
• How is the dose adjusted, and how is consistency ensured?
• Which side effects should make me call?
• Are there FDA-approved alternatives I should consider first?

For a deeper look, see: Is compounded HRT safe? FDA facts, risks & safer options.

Source: FDA menopause and compounded-hormone guidance.

What changed with FDA HRT warnings in 2025–2026?

In November 2025, the FDA began removing the long-standing “boxed warning” language about cardiovascular disease, breast cancer, and probable dementia from estrogen-containing menopausal hormone therapy, following a scientific review. In February 2026, the FDA approved the first batch of six products with that updated labeling. This is a labeling change reflecting reassessed evidence — not a declaration that HRT is risk-free or right for everyone. Notably, the FDA is keeping the boxed warning about endometrial cancer for estrogen-alone systemic products.

What happened.On November 10, 2025, the FDA (with HHS) announced it was initiating removal of the broad boxed warnings on menopausal hormone therapy after a comprehensive literature review and an expert panel. At the agency's request, 29 drug companies submitted proposed labeling changes.

The first six products.As of the FDA's February 12, 2026 updated-prescribing-information page, six products had approved label changes — removing the cardiovascular, breast-cancer, and probable-dementia boxed-warning language:

• Prometrium (progesterone capsules) — progestogen alone
• Divigel (estradiol gel) — systemic estrogen alone
• Cenestin and Enjuvia (synthetic conjugated estrogens) — systemic estrogen alone
• Estring (estradiol vaginal ring) — vaginal estrogen
• Bijuva (estradiol + progesterone capsules) — combined therapy

More manufacturers' submissions were still working through the process, so additional products are expected to update their labels over time.

One real-world ripple worth knowing. The renewed attention to HRT — and especially patches — has driven a sharp surge in demand. Reporting in 2026 found estrogen patch prescriptions up roughly 184% since 2023, and that surge has led to estrogen patch supply gaps at pharmacies. If your pharmacy is out of a patch, ask your clinician about alternatives or other brands rather than going without.

For a deeper read: 2026 HRT label changes explained and FDA black-box warning on HRT — what it said and what changed.

Sources: FDA press announcements (Nov 2025, Feb 2026) and updated-prescribing-information page; HHS; American Cancer Society; Harvard Health; Reuters and CNN reporting on patch demand and supply.

What should you ask your clinician about HRT side effects?

If you're having HRT side effects, don't stop, raise, lower, or combine hormones on your own — those symptoms can reflect your dose, route, timing, progestogen choice, or a problem that needs evaluation. Bring a short symptom log and ask whether your side effect is expected, whether any testing is needed, and whether a change in route, dose, or formulation would help. A focused, written summary turns a rushed visit into a productive one.

Your symptom log — jot these down

• Date you started HRT
• Product name, dose, and route
• Your estrogen and progestogen schedule
• Whether you have a uterus
• The symptom, and its severity (1–10)
• When it happens relative to your dose
• Your bleeding pattern
• Blood pressure, if relevant
• Other medications and supplements
• Which red flags are present or absent

Questions worth asking

• Is this side effect expected at this stage?
• How long should I track it before we change anything?
• Is my dose too high, too low, or just new?
• Would a patch, gel, oral, vaginal, or different progestogen change my side effects?
• Do I need labs, a blood-pressure check, imaging, a pelvic exam, or a mammogram?
• Is my plan FDA-approved, compounded, or both?
• Which symptoms mean I should stop and call you — and which mean urgent care?

If side effects are your main worry, how should you choose an online HRT provider?

If side effects are your biggest fear, the best online HRT provider isn't the cheapest or fastest — it's the one that gives you clinician access, clear follow-up, FDA-approved options when appropriate, lab or imaging coordination when needed, and a real process for adjusting your treatment if something goes wrong. Match the provider to your actual concern: someone worried about safety and monitoring is best served by clinician oversight and labs, not by the lowest-friction cash-pay option.

We rank by your fear: if I get a side effect, will a qualified person actually help me fix it safely?For this page's reader, that reorders everything — and it means the providers with the strongest clinical-support model come first.

Much of this is provider-stated information we confirmed on each company's current pages in June 2026, not independently tested outcomes — pricing, availability, and formulations change fast, so confirm the details at checkout. Some links below are affiliate links, and we may earn a commission if you sign up through them, at no extra cost to you. Our ranking reflects fit for a side-effect-anxious reader, not payout. Where a provider has a real limitation, we say so. Read more about how we compare online HRT providers.

Provider support, compared (confirmed on provider pages, June 2026)

A note on what these mean in plain English: if your number-one worry is safety and being looked after, you want oversight and monitoring — that's Midi (and Sesame if cost is tight). Hers is a solid mainstream middle ground with FDA-approved options and a provider who can adjust your plan. Winonais built for cash-pay convenience and async care — fine if you understand which of its options are compounded and you don't need routine labs. Oestrais a narrower, specialized choice. For most side-effect-anxious first-timers, we'd steer you toward FDA-approved options with a clinician who can actually monitor you.

Two real patient notes

These are individual experiences shared on Midi's site — not a guarantee of results, and not medical outcomes, but useful on the question that matters here: does someone actually coordinate your care?

“Midi is easy. My Nurse Practitioner ordered labs, a mammogram, and prescription medication that I could take care of on my own schedule.”
— from a patient testimonial published on Midi Health's website

“I spent almost three years being dismissed by doctors and told to nap more. I've been so happy to find a team that knows how to help women through this transition.”
— from a patient testimonial published on Midi Health's website

You've done the homework most people skip. When you're ready to talk to someone who'll actually monitor you, here's where to start — each link goes to that provider to check current pricing, availability, and eligibility:

• Want clinician oversight, FDA-approved options, and possible insurance coverage? Check Midi's availability and coverage in your state →
• Want a clear $59/month care price with labs if clinically ordered? See Sesame's menopause plan →
• Want a mainstream brand with patch-based options? Start the Hers menopause intake →
• Want cash-pay async care with FDA-approved and compounded options clearly separated? Review Winona's current options →
• Specifically researching Oestra? Review its formulation and terms first →

Provider details confirmed on each company's pages June 15, 2026. Pricing, state availability, and formulations change — confirm current terms on the provider's site before deciding.

What we actually verified for this page

Who created this. This guide was written by The HRT Index Editorial Team. The HRT Index is an independent comparison resource for HRT telehealth providers.

Medical and regulatory facts — verified against authoritative sources: The FDA/HHS action on menopausal hormone therapy boxed warnings; the oral-vs-transdermal difference in blood-clot risk (confirmed against JCEM meta-analysis, NICE 2024 guidance, and Menopause Society statements); breast-cancer nuance by HRT type, progestogen type, duration, and age (confirmed against American Cancer Society, Breast Cancer Research Foundation, and International Menopause Society); common early side effects and the typical settling-in timeline (NHS, MedlinePlus, and menopause-clinic clinical sources).

Commercial facts — confirmed on each provider's current pages (June 2026), and labeled as provider-stated where relevant:Midi's 50-state availability, PPO-insurance positioning, FDA-approved prescribing, lab/Pap/mammogram coordination, and self-pay pricing ($250 initial / $150 continued). Sesame's $59/month menopause subscription, included labs if ordered, and separate medication billing. Hers' estradiol and progesterone prescribing, off-label statement, and reported patch pricing. Winona's FDA-approved-vs-compounded product split, no-routine-labs model, cash-pay pricing, and 37-states-plus-Puerto-Rico availability. Inner Balance/Oestra's compounded vaginal-cream formulation, pricing, and refund terms.

Medical review. This page has not been individually reviewed by a named physician. Where facts are time-sensitive, we mark them and re-verify on a regular schedule. It is not a substitute for personalized medical advice.

Affiliate disclosure. The HRT Index is an independent comparison resource for HRT telehealth providers. Some links on this page are affiliate links, and we may earn a commission if you sign up through them, at no extra cost to you. This does not influence our clinical accuracy or the safety information on this page, and it does not change which warning signs, risks, or provider limitations we report. Our rankings reflect fit and evidence, not payout.

Medical disclaimer. This article is for general education only. It is not medical advice, diagnosis, or treatment, and it does not replace care from a qualified clinician. Hormone therapy decisions depend on your individual health history. Do not start, stop, or change any medication based on this page alone. If you think you may be having a medical emergency — including signs of a blood clot or stroke — call your local emergency number immediately.

Last verified: June 15, 2026. Next scheduled review: July 15, 2026 (provider facts); September 15, 2026 (clinical and regulatory sources), or sooner if the FDA updates.

HRT side effects: frequently asked questions

Sources & references

1. U.S. FDA — FDA Approves Labeling Changes to Menopausal Hormone Therapy Products (Feb 12, 2026). fda.gov
2. U.S. FDA — Menopausal Hormone Therapies with Updated Prescribing Information (updated Feb 12, 2026). fda.gov
3. U.S. FDA / HHS — HHS Advances Women's Health, Removes Misleading FDA Warnings on Hormone Replacement Therapy (Nov 10, 2025). fda.gov
4. U.S. FDA — Menopause (consumer guidance, incl. compounded bioidentical hormones). fda.gov
5. American Cancer Society — What to Know About Hormone Replacement Therapy and Cancer Risk (2026). cancer.org
6. NHS — Side effects of hormone replacement therapy (HRT). nhs.uk
7. MedlinePlus — Estrogen and Progestin (Hormone Replacement Therapy). medlineplus.gov
8. Mayo Clinic — Hormone therapy: Is it right for you? mayoclinic.org
9. Cleveland Clinic — Hormone Therapy for Menopause Symptoms. clevelandclinic.org
10. NICE / NCBI Bookshelf — Comparative Evidence Between Transdermal and Oral Menopausal Hormone Therapy. ncbi.nlm.nih.gov
11. Mohammed K, et al. — Oral vs Transdermal Estrogen Therapy and Vascular Events: Systematic Review & Meta-Analysis. J Clin Endocrinol Metab. 2015. academic.oup.com
12. The Menopause Society — Comments on the FDA Announcement on Hormone Therapy (Nov 2025). menopause.org
13. International Menopause Society — Micronized progesterone and breast cancer risk. imsociety.org
14. Breast Cancer Research Foundation — HRT and Breast Cancer Risk Explained (2026). bcrf.org
15. Harvard Health — FDA removes menopause hormone therapy black box warnings (Nov 2025). health.harvard.edu
16. Reuters — Patients scramble to find estrogen patches as shortage worsens after US FDA champions use (Apr 2026). reuters.com