Last Updated: October 7th, 2026
Reading Time: 11 mins
Progesterone intolerance does not mean you can’t take HRT. It usually means the type, dose or route of progestogen you were given doesn’t suit you, and there are several well-recognised ways to change it. If you have a womb, you still need a progestogen alongside oestrogen to protect the womb lining, so stopping it on your own isn’t the answer. Speak with us first, because the fix is usually a switch, not giving up HRT. This guide explains what progesterone intolerance is, how it differs from an allergy, how long it lasts and what the alternatives look like.
Progesterone intolerance is a term for unwanted mood or physical effects after taking progesterone or a synthetic progestogen, whether in HRT, contraception or a hormonal intrauterine system. It isn’t a formal diagnosis, and no blood test confirms it. We recognise it from the pattern: symptoms that start or worsen after beginning a progestogen, or in the days each month when progesterone is highest, and that ease when the treatment changes. You may also see it called progestogen intolerance or progesterone sensitivity. These describe the same experience. It can appear with the first dose, after a change of product or dose, or only after months of treatment that seemed fine.
Two terms need separating. Progesterone is the hormone your ovaries make. Progestogen is the wider family, which includes synthetic versions made in a laboratory. Body-identical progesterone, also called micronised progesterone, has the same structure as your own hormone. Synthetic progestogens have a different structure and can act on other hormone receptors, which may explain why they suit some women less. One idea is that body-identical progesterone breaks down into allopregnanolone, a calming brain chemical, and that some women respond to it with anxiety or irritability instead. This is thought to explain some mood effects, but it isn’t proven for every woman.
How common is progesterone intolerance? Nobody knows precisely. An older review published in 1997 estimated that around one in five women taking HRT has significant progestogen intolerance, and that about half of them are affected badly enough to stop treatment. Those figures are dated, so treat them as a rough guide only. Studies of why women stop HRT consistently list side effects among the most common reasons. Many women stop quietly and never learn that a different progestogen might have suited them.
Progesterone intolerance symptoms tend to fall into two groups, and they can look a lot like PMS. The NHS lists many of them as progestogen side effects:
Progesterone intolerance bloating and breast tenderness are common, and our guide to sore breasts explains when breast pain needs attention.
Timing is the clue. The signs of progesterone intolerance usually begin soon after starting or changing a progestogen, or rise and fall with the days you take it. If you take a progestogen for only part of each month, as many women on sequential HRT do, symptoms often cluster in those days and ease in the days without it. Symptoms that were there before treatment, or that settle without any change, point elsewhere. HRT side effects can also resemble menopause symptoms, so the NHS notes that it may not be your HRT causing them.
Progesterone intolerance and anxiety is the combination many women notice first. It can feel like a sudden edge of dread, a short temper or tearfulness with no clear trigger, and it is easy to blame stress or the menopause itself. Progesterone intolerance mood swings often arrive within hours of a dose, or in the same week of each cycle, and they tend to ease once the progestogen is out of your system. A mood diary kept for a few weeks, noting each dose and how you feel, is one of the most useful things you can bring to a consultation, because it shows the pattern more clearly than memory can.
Progesterone intolerance insomnia is reported, but it runs against the usual pattern. Trials of body-identical progesterone generally show better sleep, with quicker sleep onset and fewer wakings, and drowsiness is a recognised effect, which is why it is normally taken at bedtime. If you sleep worse after starting a progestogen, it can still be the cause, but low oestrogen, night sweats and anxiety are more common explanations, and a change of timing or dose often helps. We look at the whole picture before blaming one hormone.
Progesterone heat intolerance is a weak link. Progesterone raises core body temperature slightly after ovulation, but feeling too hot is far more often a sign of hot flushes, which involve a narrowed comfort zone for temperature, or of an overactive thyroid. If heat, sweating, a racing heart or weight loss are new for you, a blood test is the sensible next step. Our guide on thyroid problems explains why they are so often missed.
Progesterone intolerance menopause questions almost always come back to HRT, and progesterone intolerance perimenopause is similar when a progestogen is taken in a monthly pattern. Here is why a progestogen is part of HRT at all. Oestrogen thickens the womb lining. If you have a womb, taking oestrogen on its own raises the risk of that lining overgrowing and, over time, of womb cancer. A progestogen counters this, which is the endometrial protection HRT is designed to provide, and it is why NICE recommends combined HRT for people with a womb. If you have had a hysterectomy, you generally take oestrogen alone. We use “menopause” here to cover the whole transition, including perimenopause, because intolerance can appear at any stage of treatment.
Progesterone intolerance HRT problems lead some women to stop the progestogen without telling anyone, which leaves the womb lining unprotected. Please don’t do this. Speak with us instead, and we can change the type, dose or route. Unexpected bleeding is a separate question, covered in our guide to bleeding on HRT.
There is no test that confirms progesterone intolerance. Blood or saliva hormone levels don’t diagnose it, because the problem is how your body responds to the hormone, not how much is in your blood. Diagnosis is clinical. We look at what you take, when symptoms began, whether they follow the days you take the progestogen, and whether they ease when it changes. We also check for other causes that can mimic it, such as an underactive or overactive thyroid, low iron or an oestrogen dose that is too low, because fatigue, low mood and anxiety have many possible sources. A test sold online for progesterone intolerance can’t replace that assessment.
A progesterone sensitivity test does exist, but for a different condition: progestogen hypersensitivity, a rare allergic-type reaction. Specialists diagnose it from the pattern of symptoms through the cycle and confirm it with a small progesterone skin test, usually in an allergy or dermatology clinic. It isn’t used for ordinary intolerance, so a negative result would not rule intolerance out.
Progesterone allergy symptoms look different from intolerance. Progestogen hypersensitivity, formerly called autoimmune progesterone dermatitis, can cause hives, eczema, skin swelling and, rarely, breathing difficulty or anaphylaxis. Symptoms often start several days before a period and clear a couple of days into it, and the reaction can be to your own progesterone or to a progestogen in treatment. It is rare, and most women with mood changes and bloating on HRT don’t have it. This table shows the difference:
| Feature | Progesterone intolerance | Progestogen hypersensitivity |
| Typical symptoms | Anxiety, irritability, low mood, bloating, breast tenderness, headaches | Hives, eczema, skin swelling, rarely breathing difficulty |
| What is happening | Sensitivity to the hormone’s effects | Allergic-type immune reaction |
| How common | Common | Rare |
| Test | None, diagnosed clinically | Clinical history plus a progesterone skin test |
| Usual action | Change the type, dose or route | Specialist allergy or dermatology care |
Can you be allergic to progesterone? Yes, but it is uncommon. If a rash or hives follow a similar pattern each cycle, or start after you begin a progestogen, tell us so we can assess it properly. Not every rash is hypersensitivity, as mild rash and itchy skin are listed progestogen side effects too. Swelling of the face or lips, or any difficulty breathing after a dose, needs emergency help, so call 999.
Does progesterone intolerance go away? Often, yes. The NHS says HRT side effects usually improve over time and advises carrying on for at least three months where possible, because early effects can settle as your body adjusts. If effects are severe, or last beyond three months, that is the point to speak with us, because waiting longer rarely helps. Intolerance that persists doesn’t usually fade by itself, but it often responds to a change: a different progestogen, a lower dose, a different route or timing, or a hormonal intrauterine system. Progesterone intolerance treatment is mostly about matching the progestogen to you. A review at around three months is the usual checkpoint. By then we can see whether symptoms are settling, whether they follow the progestogen, and whether a change is the next step, so you aren’t left guessing for six months. If you are tolerating treatment well apart from one troublesome symptom, a small adjustment is often enough, and we won’t change more than we need to.
How much progesterone is too much has no single answer. The dose that protects the womb lining depends on the oestrogen dose and the regimen, so an amount that suits one woman can be too little or too much for another. Signs that the dose or type isn’t suiting you include marked drowsiness, dizziness, low mood, bloating and breast tenderness, which are all listed progestogen side effects. Please don’t adjust, skip or add progesterone yourself, including products bought online. The right dose is the one that protects the womb lining while you feel well, and a clinician needs to set it.
Progesterone intolerance alternatives start with working out which progestogen you take and how you take it. The British Menopause Society sets out several routes for women who can’t tolerate one progestogen. The main options are:
The first step in Dr Raquel Delgado‘s consultations is a simple timeline: what you took, when symptoms began and how they changed. That timeline usually points to the right switch, and we then review how you feel a few weeks after the change, because it can take time to settle. If the first change doesn’t help, the list above gives us further options to try one at a time, so we can see what each one does. Body identical progesterone side effects still occur, drowsiness being the best known, so no option is a guaranteed fix. Both the British Menopause Society and NICE note that body-identical progesterone may carry a slightly lower risk of clots and breast cancer than other synthetic progestogens, and that any difference is small. We go through the risks and benefits with you personally.
Can you take HRT without progesterone? If you have a womb, not safely. Oestrogen on its own can overgrow the womb lining, so some form of progestogen is needed, which is why the options above change the progestogen and don’t remove it. If you have had a hysterectomy, you generally take oestrogen alone, so progestogen intolerance doesn’t arise. Non-hormonal treatments exist for some menopause symptoms, though they work differently from HRT, and we can talk through whether they suit you.
Dr Raquel Delgado is a private GP in London with more than 20 years of clinical experience in general practice, women’s health, and hormonal care. She has a particular focus on doctor-led, natural-looking aesthetic treatments for women, and consults in both English and Spanish. Every consultation is with Dr Delgado personally, giving you the same clinician’s judgement and continuity of care each time.
If HRT or a progestogen is making you feel worse, that calls for a proper conversation, not toughing it out or stopping on your own. We can review what you take, find the likely cause and talk through changes that protect the womb lining while you feel better. You can read more about our approach on our Women’s Health page, our GP services more broadly, or our homepage. Wellness Library offers further reading. To arrange a consultation, contact us directly or reach out using the details below:
A few signs call for prompt attention rather than waiting:
If any of these apply to you, that needs proper assessment with us rather than being left to settle on its own.
No, though they can look alike. Premenstrual dysphoric disorder is a severe monthly mood condition linked to the natural cycle, while progesterone intolerance is a reaction to progesterone or a progestogen, often in treatment. They can overlap, and we can help tell them apart.
That depends on what you take now and why you take it. Options include a different progestogen or regimen, a hormonal intrauterine system, or a different HRT product. If you have a womb, some progestogen is still needed, so please speak with us before changing anything.
Usually, yes. Most women find a progestogen that suits them once the type, dose or route changes. If you have had a hysterectomy, you generally don’t need a progestogen at all.
It can in some women. Mood changes, including low mood, are listed progestogen side effects, and body-identical progesterone is thought to affect mood through a calming brain chemical in ways that vary between women. If your mood worsens after starting treatment, tell us promptly.
It can, for example after a change of product, dose or brand of progestogen, or as the rest of your hormones shift. Symptoms that begin after a change are a good reason to review the regimen with us.
This article is for general information and does not replace a personal consultation. If you have concerns about HRT, your mood or unusual bleeding, please get in touch with us promptly.
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