Prescribed antidepressants for perimenopause low mood? Here’s what I think you should know first

If you have been offered antidepressants for low mood in perimenopause, without anyone assessing your hormones, your nutrient status, or your sleep, there are some things worth knowing before you decide.

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This article is not about whether you should take antidepressants or not.  That is not for me to decide but a conversation between you and your doctor, but what I am going to do is give you some information that many women do not have when they are first handed a prescription. Information that I think you deserve.

What the guidelines actually say

NICE guidance in the UK is clear: antidepressants are not recommended as a first-line treatment for low mood in perimenopause or menopause in women. HRT (Hormone Replacement Therapy) or CBT (Cognitive Behavioural Therapy) are recommended and antidepressants are only advised if you have a formal diagnosis of clinical depression.

And yet, I hear time and again how my clients are being offered antidepressants as a first-line treatment for low mood in perimenopause and menopause.

There is no good evidence that SSRIs or SNRIs relieve low mood caused by hormonal fluctuation. Antidepressants work on serotonin reuptake in the brain, but all too often low mood of perimenopause is not primarily a serotonin reuptake problem. It is driven by declining oestrogen, which directly affects how serotonin, dopamine, and GABA are produced and used in the first place.

Treating a downstream symptom without addressing the upstream cause is unlikely to work well.

What is actually happening in your brain

Oestrogen is not just a reproductive hormone, but It is an active regulator of brain chemistry.

It supports the production of serotonin and its receptor sensitivity, influences dopamine, and modulates GABA, the brain’s main calming neurotransmitter. As oestrogen fluctuates and falls in perimenopause, all of these systems become less stable.

This is why perimenopausal low mood often feels different from depression with other origins. Women frequently describe emotional flatness, loss of motivation, and a blunted sense of enjoyment, alongside anxiety, irritability, or panic. It is not one thing, but a pattern of neurochemical disruption driven by hormonal change.

An antidepressant addresses one piece of this. It does not address the hormonal shift that is causing it.

Progesterone is falling too

Oestrogen is not the only hormone shifting in perimenopause, and it is often not even the first, since progesterone tends to decline earlier and more erratically, as ovulation becomes less frequent and less predictable, which means many women notice mood changes years before hot flushes or other classic perimenopausal symptoms appear.

In the brain, progesterone is converted into a compound called allopregnanolone, which acts directly on GABA receptors, the same calming system that oestrogen also supports, and this is what gives progesterone its natural anxiety-reducing and sedative effect, so when progesterone falls, or swings unpredictably from one cycle to the next, allopregnanolone production falls and fluctuates with it, and the nervous system loses one of its steadiest sources of calm.

This helps explain why anxiety, irritability, and disrupted sleep are so often the first signs that perimenopause has begun, well before anyone thinks to test hormones or consider HRT, and it also means the picture is rarely about one hormone falling in isolation, since oestrogen and progesterone are usually moving out of sync with each other, at different rates and on different timelines, which is part of why perimenopausal mood symptoms can feel so unpredictable from one month to the next, and why an approach built around a single neurotransmitter rarely holds up against what is actually driving the shift.

The other drivers that are usually missed

In clinic, low mood in perimenopause almost never has just one cause. Alongside hormonal fluctuation, I typically see:

• Blood sugar instability. As oestrogen falls, insulin sensitivity changes. Blood sugar swings more easily, and blood sugar dips have a direct and immediate impact on mood, energy, and anxiety. Many women are living with this without realising it is a driver.

• Nutrient deficiencies. B vitamins, folate, magnesium, iron, and zinc are all required as cofactors in neurotransmitter production. If these are low, the brain literally does not have the raw materials to make adequate serotonin and dopamine, regardless of what an antidepressant is doing at the receptor level.

• Disrupted sleep. Night waking, difficulty settling, early morning cortisol spikes: these are perimenopausal symptoms that directly cause low mood. Not just correlate with it. Research is clear that poor sleep has a significant independent impact on mood, separate from any other factor.

• A stressed nervous system. Perimenopause frequently coincides with the most demanding chapter of a woman’s adult life. Chronic stress depletes the same neurotransmitter pathways that oestrogen supports. When both are compromised together, the nervous system runs on very little reserve.

The questions worth asking

Before you accept a prescription, or as you think about what else might help alongside one you are already taking, these are the questions I think are worth raising:

• Has anyone assessed whether this is hormone-driven? A proper look at oestrogen, progesterone, and testosterone, and a conversation about whether HRT might be appropriate, is a reasonable starting point for perimenopausal mood symptoms.

• Has anyone checked your nutrient levels in detail? A standard GP panel does not include most of the nutrients that directly affect mood. Folate, active B12, magnesium, ferritin, and zinc are worth assessing.

• How is your sleep, and why is it disrupted? Night sweats, cortisol patterns, and a dysregulated nervous system all interfere with sleep differently and respond to different support.

• Is your blood sugar stable across the day? Erratic energy, afternoon crashes, cravings, and mood dips that follow a predictable daily pattern are often blood sugar related and very manageable.

What this is not

This is not an argument that antidepressants are wrong, it is not a suggestion that your GP has made a mistake, and it is certainly not advice to stop taking medication you are currently prescribed.

But it is an argument that you need to look at a fuller picture.

Many of the women I work with are on antidepressants when we first meet. Some continue to take them while we address root causes together, while others find, as hormonal, nutritional, and metabolic factors stabilise, that they want to explore coming off with proper medical support.

The most important thing is that you understand your options. That you know the question “is this hormonal?” deserves a proper answer, and that low mood in perimenopause is not a life sentence, even when it has been present for a long time.

If you want to understand what is driving your mood symptoms, a Clarity Call is the place to start. We can look at your individual picture and work out what is most likely to help.