Why Perimenopause Can Feel Like a Mental Health Struggle (Even If You've Never Felt this Before)

By Shannon Parks, DO DABPN

Somewhere in your late 30s or 40s, you may notice something unsettling: anxiety that seems to come out of nowhere, a short fuse you don't recognize, or panic that grips you for no clear reason, even though you've never struggled with your mental health before. If this is happening to you, you're not imagining it, and you're not "just stressed." What you may be experiencing is a real, biologically-driven shift tied to perimenopause, and it deserves to be understood, not dismissed.

The hormone-mood connection is not a theory — it's neuroscience

Estrogen does far more than regulate your menstrual cycle. It plays a direct, active role in how your brain manages mood, largely through its effects on two key neurotransmitter systems: serotonin and GABA.

Estrogen and serotonin. Estradiol (the primary form of estrogen) increases the amount of serotonin available in the brain by inhibiting the enzymes that break it down, and by supporting serotonin receptor activity more broadly [1,2]. Serotonin, in turn, is central to mood stability, so when estradiol levels swing unpredictably — which is exactly what happens during perimenopause, even more so than the eventual low, steady levels of full menopause — serotonin's mood-stabilizing effects become inconsistent too [1,2].

Estrogen, allopregnanolone, and GABA. Progesterone's metabolite allopregnanolone acts on GABA-A receptors, the brain's primary "calming" system. Allopregnanolone enhances GABA's inhibitory signaling, which helps regulate anxiety and stress reactivity [1,3]. As hormone levels fluctuate and eventually decline in perimenopause, this calming support becomes less reliable — weakening the brain's ability to regulate hyperarousal, anxiety, and sleep [3].

The key detail research has clarified in recent years: it's the fluctuation itself, not just the eventual decline, that drives symptoms. Perimenopause involves some of the most erratic hormone swings of a woman's reproductive life — larger peaks and deeper troughs than even a typical menstrual cycle — and it's this instability that appears to destabilize mood regulation systems in the brain [1,2].

This is why new-onset anxiety, rage, and panic are so common — and so real

Research has consistently found that women face a significantly elevated risk of first-time depression and anxiety during perimenopause specifically — a risk that isn't explained by prior psychiatric history, life stress, or other typical risk factors alone [1,2]. In other words, this can happen to women who have never had a mood or anxiety disorder in their life.

There's also a distinct symptom pattern worth naming. Traditional depression is often associated with sadness, but perimenopausal mood changes are frequently characterized more by irritability, anger, and sudden emotional outbursts that feel out of character — episodes that can appear and resolve within minutes to hours [4]. If you've felt disturbed by your own reaction to something small, or by anxiety that arrives without warning, this pattern is a documented feature of perimenopausal mood change, not a personal failing.

Why it so often gets misdiagnosed — or dismissed entirely

Here's the frustrating part: many of the criteria used to diagnose standard depression — sleep disruption, appetite changes, fatigue, trouble concentrating — overlap directly with ordinary perimenopause symptoms, making it genuinely difficult to tell the two apart without a clinician who is specifically looking for that overlap [1]. Too often, that overlap doesn't get investigated at all.

A 2024 clinical audit at a tertiary care psychiatric hospital illustrates this clearly: among 250 women aged 45–55 who had already been diagnosed with depression, a retrospective screening found that 78% actually had significant, previously unrecognized perimenopausal symptoms — and only 45% of these women reported that their treatment had been genuinely effective [5]. The vast majority had simply been started on antidepressants, without anyone ever screening for the hormonal transition underlying their symptoms [5].

This is precisely the gap we built our practice to close.

Why treatment should look different here

Because the underlying mechanism is hormonal, not purely psychiatric, effective treatment often needs to account for both. Hormonal therapy has shown real promise in treating perimenopausal mood symptoms directly, in some cases as effectively as — or as a valuable complement to — traditional antidepressants [4]. That doesn't mean hormones are the answer for everyone, or that psychiatric medication and therapy don't have an important role. It means your treatment plan should be built around what's actually driving your symptoms, rather than treating anxiety or depression as an isolated diagnosis disconnected from what's happening hormonally.

You deserve to be taken seriously

If you've been told your symptoms are "just stress" or "just getting older," or you've been prescribed a medication that never quite fit what you were experiencing, that's not a reflection of your resilience or your reality — it may simply mean the hormonal piece was never considered. At The Parks Center, evaluating that connection is built into how we approach care from the very first visit.

This blog post is for general educational purposes and isn't a substitute for individualized medical advice. If you're struggling with your mental health, please reach out to a licensed provider.

References

[1] Fidecicchi T, Giannini A, Chedraui P, Luisi S, Battipaglia C, Genazzani AR, Genazzani AD, Simoncini T. Neuroendocrine mechanisms of mood disorders during menopause transition: A narrative review and future perspectives. Maturitas. 2024;188:108087.

[2] Gordon JL, Girdler SS, Meltzer-Brody SE, Stika CS, Thurston RC, Clark CT, Prairie BA, Moses-Kolko E, Joffe H, Wisner KL. Ovarian hormone fluctuation, neurosteroids, and HPA axis dysregulation in perimenopausal depression: a novel heuristic model. American Journal of Psychiatry. 2015;172(3):227-236.

[3] Garg R, Munshi A. Menopause and Mental Health. Journal of Mid-Life Health. 2025;16(2):119-123.

[4] Herson M, Kulkarni J. Hormonal Agents for the Treatment of Depression Associated with the Menopause. Drugs & Aging. 2022;39(8):607-618.

[5] Gul N. Identifying Perimenopausal Symptoms in Women Diagnosed With Depression: A Focused Audit at a Tertiary Care Hospital. BJPsych Open. 2024.

About the Author

Shannon Parks, DO, is a Diplomate of the American Board of Psychiatry and Neurology and Founder and Medical Director of The Parks Center for Women’s Wellness and Medicine in Tinton Falls, NJ. She is recognized for delivering elevated, root-cause–driven integrative psychiatric care and for advancing comprehensive mental health treatment for women.