Hormone Therapy for Hot Flashes, Night Sweats and Mood: How Well It Works

Our female patients come to us to find out if menopausal hormone therapy (MHT) actually works, what the risks are, and if it needs to be continued forever. Women arrive having read that hormone therapy either gives you your life back or nearly killed a generation, and we're here to help sort that out.

Does it work, by how much, and for how long?

The best pooled evidence is a Cochrane systematic review of 24 double-blind, placebo-controlled trials of oral estrogen and combined estrogen-progestogen therapy, in more than 3,300 women. Hormone therapy reduced weekly hot flash frequency by about 75 percent relative to placebo, with a confidence interval from roughly 64 to 82 percent, and cut symptom severity substantially as well. That is a large effect by the standards of anything in medicine, and it is why the Menopause Society still names hormone therapy the most effective treatment for vasomotor symptoms (hot flashes and night sweats) in the same document where it recommends alternatives.

In the SWAN study, the Study of Women's Health Across the Nation, the median total duration of hot flashes and night sweats was 7.4 years after the final menstrual period. Women who first reported vasomotor symptoms while still premenopausal or in early perimenopause had the longest course, a median of more than 11.8 years. "Just ride it out" is not much of a plan given the lengthy time course for many women.

Estradiol delivery: through the skin or by mouth

Oral estradiol passes through the liver before it reaches the rest of your body, and that first pass can stimulate clotting factors. A patch, gel or spray bypasses this "first pass" through the liver and the resulting slightly increased risk clotting. 
No large randomized trial has compared the routes of delivery head to head for clotting outcomes, but observational evidence suggests there is a lower risk of clotting when estradiol is delivered through the skin. This is especially important in patients who have a prior history of a  blood clot, migraine with aura, higher body weight or a strong family history of clotting.

Progestogen

If you have a uterus, estrogen thickens the endometrium, and over time this raises the risk of endometrial cancer.  Taking a progestogen mitigates that risk. Micronized progesterone is one of our preferred progestogens for two reasons: it has not shown the added clot signal associated with some synthetic progestins, and observational cohort data suggested a more favorable breast cancer risk, though that comparison is not settled. Progesterone can be calming, so it is taken at bedtime. Sleep that does not recover once the sweats do is an important concern, handled in our article on menopause insomnia.

What the first three months look like

Most women notice hot flashes easing within two to four weeks of an effective dose, with the full effect by eight to twelve weeks. Night sweats often improve first, which is why sleep is usually the first thing patients note. We start low, review progress every few weeks, then adjust: up if flashes still break through, down if there is breast tenderness, bloating or nausea.

Some irregular vaginal bleeding in the first months is common and usually settles. Bleeding that persists beyond six months or starts after things had settled, deserves a full evaluation. 

The mood question

Perimenopausal depression is a real and distinct phenomenon. The risk of clinically significant depressive symptoms rises during the menopausal transition even in women with no prior history, and the driver appears to be the fluctuation of hormones rather than the absolute level.

We have solid evidence that estradiol can help with mood symptoms. In a double-blind, placebo-controlled trial of transdermal estradiol in perimenopausal women with depressive disorders, published by Soares and colleagues in 2001, 68 percent of women on estradiol achieved remission compared with 20 percent on placebo. A later randomized trial in JAMA Psychiatry (2018) found that transdermal estradiol with intermittent micronized progesterone prevented new depressive symptoms in initially well women in the transition: 17.3 percent developed clinically significant symptoms versus 32.3 percent on placebo.

Estradiol is not a general antidepressant, and no guideline endorses it as monotherapy for major depressive disorder. The sorting question is whether your mood changed alongside your cycles and your other transition symptoms. If it did, estradiol should be part of the conversation. If you have carried depression for decades and it happens to be present now, therapy and an antidepressant are the evidence-based choices. Plenty of women need both.

If hormones are contraindicated for you

Non-hormonal Options

• Neurokinin receptor antagonists. Fezolinetant, approved in May 2023, blocks the NK3 receptor on the hypothalamic neurons that generate hot flashes and night sweats. To be sure the liver is not bothered by this medication, the FDA advises liver blood tests before starting fezolinetant, then monthly for the first three months, and again at six months and nine months. Elinzanetant, approved 24 October 2025 and sold as Lynkuet, is the first dual NK1 and NK3 antagonist. It improves sleep and hot flash frequency and severity compared to placebo.
• SSRIs and SNRIs. These anti-depressant/anti-anxiety medications provide a modest but real reduction in vasomotor symptoms.
• Gabapentin.  This medication can be sedating, so it is taken at night. It can help with menopausal night sweats and insomnia.
• Cognitive behavioral therapy and clinical hypnosis. CBT improves the way menopausal symptoms affect your life. 
• Oxybutynin, weight loss, and stellate ganglion block.  These are also recommended by the Menopause Society but are used less often. 

How we prescribe menopausal hormone therapy at Framework Health

1. The full history before any prescription. We want to know your symptom pattern and severity, cardiovascular and cancer history, clot risk, migraine, and what you have already tried. 
2. Choose the form together. Together, we choose the route and dose that will work best for you.
3. Regular review. Message or call us at whatever interval works best for you.  It's quite common to adjust hormone regimens. Both providers are Menopause Society Certified Practitioners, and we use our expertise to fine tune the perfect formula for you.
4. An annual re-decision. At a minimum of annually, we meet specifically to determine whether to continue MHT.

Questions we hear about this every week

The bottom line

Menopausal hormone therapy treats hot flashes and night sweats better than anything else available, cutting frequency by roughly three quarters in placebo-controlled trials, usually within a month of the right dose. If hormones aren't the right fit for you, several nonhormonal options now have strong evidence behind them.