If men got period pain, we'd know a lot more about it by now
For decades, millions of women have quietly reached for the wrong painkiller. Supermarket data spanning nearly a decade and hundreds of millions of transactions reveals that when women buy menstrual products, they overwhelmingly choose paracetamol over ibuprofen — despite the latter being better suited to the biological mechanism of period cramps. The pattern speaks less to individual failure than to a broader silence: period pain has long been underfunded, under-researched, and under-communicated as a public health concern.
- Two-thirds of pain relief bought alongside menstrual products is paracetamol — a medication that works on the brain, not on the womb contractions actually causing the pain.
- Ibuprofen blocks prostaglandins, the substances that trigger cramping, making it the more targeted and effective choice — yet it remains the minority purchase.
- Researchers suspect familiarity and visibility drive the pattern: paracetamol is more widely advertised and perhaps more instinctively trusted, even when it is the less appropriate tool.
- Timing compounds the problem — ibuprofen works best taken preventively, before pain begins, a strategy most women may never have been told about.
- Scientists are calling this a public health education gap, noting that period pain — affecting millions monthly — has received far less research investment than conditions of comparable prevalence.
- The data opens a door: not to blame women for their choices, but to ask why clear, effective guidance has never reliably reached them.
A decade of supermarket receipts has surfaced a quiet but consequential pattern. Researchers examining 211 million transactions from a major English grocery chain found that when women purchased menstrual products, roughly two-thirds of the accompanying pain relief was paracetamol — not ibuprofen. The finding, drawn from 3.4 million shoppers between 2006 and 2015, points to a mismatch between what women are buying and what their bodies may actually need.
The distinction matters because the two drugs work differently. Ibuprofen blocks prostaglandins — the hormone-like substances that cause the womb to contract and shed its lining, producing the cramping sensation. Paracetamol, by contrast, acts on pain signals in the brain. It is well suited to headaches and fevers, but it does not address the underlying mechanism of menstrual pain. Researchers suggest that paracetamol's greater familiarity and visibility may explain its dominance on shopping receipts.
The practical implications are real. Ibuprofen is most effective when taken before pain begins — ideally the day before a period starts, before prostaglandin levels rise. Waiting until cramps are already underway and then reaching for the nearest painkiller is a common approach, but not the most effective one. For severe pain that disrupts daily life, speaking with a doctor remains the recommended step.
Professor James Goulding of Nottingham University noted, with pointed candour, that if men experienced monthly cramping of this severity, medical research would likely have addressed it far more thoroughly by now. The supermarket data, researchers argue, reveals not just a purchasing habit but a gap in public health communication — one that, with clearer guidance, could be closed.
A decade of supermarket receipts tells a quiet story about how women manage one of the most common sources of pain they experience. Researchers analyzing 211 million transactions across a major English grocery chain between 2006 and 2015 found something striking: when women bought tampons and sanitary towels, they were far more likely to reach for paracetamol than ibuprofen. The data came from 3.4 million shoppers, and the pattern was clear. About two-thirds of the pain relief purchased alongside menstrual products was paracetamol. The other third was ibuprofen.
The problem, according to the researchers, is that paracetamol is probably not the best choice for period cramps. Ibuprofen works differently in the body—it blocks the production of prostaglandins, the hormone-like substances that trigger the womb to contract and shed its lining. Those contractions are what cause the cramping sensation. Paracetamol, by contrast, works primarily in the brain to interrupt pain signals. It is excellent for headaches and fevers, but it does not address the root cause of menstrual cramping the way ibuprofen does. The researchers suggest that familiarity may explain the purchasing pattern. Paracetamol is perhaps more widely known, more advertised, or simply more visible on supermarket shelves.
Why this matters is not trivial. Period pain is a normal part of the menstrual cycle for most women, but when prostaglandin levels are higher, the cramping can be severe enough to disrupt daily life. The data provides what researchers call a snapshot of how women are actually managing this pain in the real world—a question that has received surprisingly little scientific attention. Dr. Anya Skatova from Bristol University cautioned that the supermarket data, while revealing, is not necessarily representative of the entire nation. But it does offer hints about purchasing behavior that warrant closer examination.
Professor James Goulding from Nottingham University, one of the investigators, pointed out a broader issue: the lack of robust research into period pain relief. He noted, with some wry observation, that if men experienced monthly cramping of this severity, the medical establishment would likely have invested far more in understanding and treating it. The implication hung in the air—that period pain, despite affecting millions of women every month, has been somewhat neglected as a public health priority.
The practical takeaway, according to Endometriosis UK, is timing. Ibuprofen works best when taken before pain begins—ideally the day before a period is expected, or several days in advance, before the body starts producing prostaglandins in high quantities. This preventive approach is different from waiting until cramps start and then reaching for whatever painkiller is closest at hand. For women experiencing severe period pain that interferes with work, school, or daily activities, the NHS recommends speaking with a doctor. And like any medication, ibuprofen carries potential side effects and is not suitable for everyone, so checking product information before taking it matters.
The supermarket data, then, reveals not just a purchasing preference but a potential gap in public health communication. Women are buying pain relief, and they are managing their symptoms, but they may not have access to clear information about which medication actually addresses the mechanism of their pain. The researchers see an opportunity here—a chance to educate, to inform, and to ensure that the most effective tools reach the people who need them.
Notable Quotes
There is a real public health education opportunity here, and a lack of research into period pain relief.— Professor James Goulding, Nottingham University
The Hearth Conversation Another angle on the story
Why would supermarket data be the right way to study this? Couldn't you just ask women what they take?
You could ask, but people don't always remember accurately, and they might not be truthful about what they actually buy versus what they think they should buy. Till receipts don't lie. They show real behavior at scale over a decade.
So two-thirds paracetamol. That's a pretty big gap. Why do you think that is?
Familiarity, probably. Paracetamol has been around longer, it's in more products, it's what people reach for when they think "painkiller." It's not that women are making a bad choice—it's that they may not know ibuprofen is better for this specific problem.
But ibuprofen is available in every supermarket. It's not like it's hidden or expensive.
True. But availability isn't the same as knowledge. If you don't know that ibuprofen blocks the actual cause of cramping, why would you choose it over something you already know works for other kinds of pain?
The professor made that comment about men. Do you think that's fair?
It's pointed, but it lands. Period pain affects millions of women every month, yet it's been under-researched compared to conditions that affect men. That's not an accident. It reflects what gets funded, what gets studied, what gets taken seriously.
What about the timing thing—taking it before the pain starts?
That's the insight people often miss. You're not waiting for the cramps to begin and then medicating them. You're preventing the body from producing the chemicals that cause cramping in the first place. It requires planning, which is another barrier most people don't think about.
So what changes after this study?
That's the question. The researchers are calling for public health education. But whether that actually happens depends on whether anyone listens.