#5148: How the WHO Essential Medicines List Works

Five days in 1977, eight experts, one list that now shapes what billions of people can get from their pharmacies.

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The WHO Essential Medicines List began as a five-day experiment in October 1977, when eight pharmacologists and clinical pharmacologists — mostly from Brazil, France, Italy, and the United States, with just two representatives from developing countries and no women — met in Geneva to define which medicines mattered most for global public health. They produced a 36-page booklet listing about 220 medicines. It sold out in three months.

The committee deliberately refused to publish justifications for its inclusions and exclusions, fearing endless disputes with the pharmaceutical industry, which wasn't invited to participate until the second committee in 1979. The trigger wasn't a disaster but a 1975 speech by WHO Director-General Halfdan Mahler, which led to a resolution and a three-person unit preparing the groundwork.

Most people associate "essential medicines" with emergency field kits, but that's only about twenty percent of the story. The other eighty percent is national procurement, insurance reimbursement, and the unglamorous plumbing of health systems. Over 150 countries use the list as the starting point for what public clinics stock, what national insurance pays for, and what gets imported duty-free. Emergency health kits are built on top of the list, not the other way around.

The criteria — disease prevalence, public health relevance, evidence of efficacy and safety, and comparative cost-effectiveness — remain largely unchanged. But a pivotal shift came in 2002, when affordability moved from being a precondition for listing to a consequence of it. Expensive but cost-effective medicines could now be listed, with the implication that listing would create pressure to lower prices. First-line antiretrovirals for HIV were the proof: added in 2002 at over $1,000 per patient per year, they dropped below $100 by 2007.

Today the list is updated every two years and is on its 24th edition, released September 2025. The adult list contains 523 medicines; the children's list, first published in 2007, is on its tenth edition and currently excludes all mental and behavioural disorder medicines for children under thirteen — a controversial gap that propagates into national formularies. The 2025 update added GLP-1 agonists including semaglutide, dulaglutide, liraglutide, and tirzepatide for type 2 diabetes with cardiovascular or kidney complications, and for obesity with BMI over thirty — but rejected semaglutide as a standalone obesity treatment, while explicitly warning that high prices are limiting access.

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#5148: How the WHO Essential Medicines List Works

Corn
Daniel's back with a follow-up to our episode on disaster food supplies. He wants to know about the medicine side of that same problem. The World Health Organization keeps a list of what it calls essential medicines. Not the flashiest drugs, not the cutting edge. The skeleton. His questions are straightforward. How was that list put together in the first place, how often does it change, and when does it actually matter?
Herman
The answer to that last question is where the list gets interesting, because most people hear "essential medicines" and picture a field hospital after an earthquake. That's not wrong, but it's maybe twenty percent of the story.
Corn
So what's the other eighty percent?
Herman
National procurement. Insurance reimbursement. The boring plumbing of health systems. Over a hundred and fifty countries use the WHO list as the starting point for what their public clinics will stock, what their national insurance will pay for, what gets imported duty-free. When a medicine lands on that list, it becomes a purchasing decision for a finance ministry somewhere.
Corn
So it's less a survival kit and more a shopping list for governments.
Herman
That's the better framing. And the survival kit part is real but it's downstream. The emergency health kits, the cholera kits, the trauma backpacks, those are built on top of the essential medicines list. They're separate catalogues. The list itself is about routine health systems.
Corn
Let's go back to the beginning then, because I want to understand how eight people in a room in Geneva decided what counts as essential for the entire planet.
Herman
It's worse than eight people in a room. It was eight people in a room for five days. October 1977. The first Expert Committee on the Selection of Essential Drugs met from the seventeenth to the twenty-first. Five days to produce a list of about two hundred and twenty medicines.
Corn
Five days for the foundational document of global pharmaceutical policy.
Herman
And the report was thirty-six pages. A small blue booklet. It sold out in three months, which for a WHO technical report is basically Harry Potter.
Corn
Who were the eight?
Herman
Mostly pharmacologists and clinical pharmacologists from Brazil, France, Italy, and the United States. Two from developing countries, one from Indonesia, one from Sri Lanka. No one from Africa on the original panel. They had to recruit a Ghanaian physician from the Ministry of Health specifically to fill that gap.
Corn
No women either, I'm guessing.
Herman
No women. And the pharmaceutical industry wasn't invited until the second committee in 1979.
Corn
So the industry that makes the medicines had no say in the first version of the list that would shape their market for the next fifty years.
Herman
Deliberately. And here's the detail I find most telling. The committee refused to publish justifications for why any given drug was included or excluded. They were explicit about it. One of the people involved later wrote that they felt publishing justifications would have led to endless discussions after the report came out, particularly with the pharmaceutical industry.
Corn
So they made the calls and didn't show their work.
Herman
Which is wild by today's standards. The current process publishes every application, every review, everything out for public comment. Anyone can submit a proposal to add a medicine. Researchers, patient groups, pharmaceutical companies, non-governmental organizations. It's completely open now.
Corn
But in 1977 they were basically a secret committee deciding the fate of global drug markets.
Herman
A secret committee that produced a bestseller. The thing is, the trigger wasn't a disaster. It was a 1975 speech by the WHO director-general at the time, Halfdan Mahler. He stood up at the World Health Assembly and said there was an urgent need to ensure that most essential drugs are available. That produced a resolution, and a small unit of three people started preparing the list.
Corn
Three people.
Herman
The Drug Policies and Management unit. The chief was Hiroshi Nakajima, who later became director-general himself. They did the preparatory work, then an October 1976 consultation produced an annotated list of about two hundred active substances. That was the draft the 1977 committee worked from.
Corn
What was the actual problem they were trying to solve? Because "essential medicines" sounds like a nice idea, but there had to be a specific failure.
Herman
The therapeutic jungle. That's the phrase from the period. By the mid-seventies, the pharmaceutical industry had produced thousands of products, but the innovation wasn't tracking public health needs. Developing countries were spending twenty to sixty percent of their health budgets on medicines, with up to ninety percent of that paid out of pocket. And they were buying whatever the market pushed at them, not what their populations actually needed.
Corn
So the list was a market correction.
Herman
A rationing tool, honestly. The original insight was that some medicines are more important than others. That sounds obvious now, but in 1977 it was a genuine revolution in public health thinking. The idea that you could draw a line around a few hundred drugs and say, these are the ones that matter, everything else is optional.
Corn
And the criteria?
Herman
Disease prevalence, public health relevance, evidence of efficacy and safety, and comparative cost-effectiveness. Those are still the criteria today. The second committee in 1985 spelled out the practical considerations. What diseases are actually prevalent, what treatment facilities exist, what training the available personnel have, what financial resources are there, and local genetic, demographic, and environmental factors.
Corn
So it was never just about the drugs themselves. It was about whether the system could actually deliver them.
Herman
A medicine that requires refrigeration and a specialist to administer is not essential for a rural clinic with no electricity and a nurse with six months of training. That's why you see older, simpler drugs on the list sometimes instead of newer, better ones. The question is not what works in a Boston teaching hospital. It's what works in a district hospital in rural Zambia with intermittent power and one pharmacist.
Corn
Which is probably why the list has a reputation for being conservative.
Herman
And that reputation is partly earned, partly outdated. The list today has five hundred and twenty-three medicines for adults, three hundred and seventy-four for children. That's a lot of drugs. The 2007 edition had three hundred and forty. It's grown substantially.
Corn
How often does it actually get updated?
Herman
Every two years, like clockwork, since 1977. The current version is the twenty-fourth edition, released in September 2025. The Expert Committee meets for a week in Geneva, reviews applications, makes decisions, and the new list comes out.
Corn
And the children's list?
Herman
That's separate. The first Essential Medicines List for Children appeared in 2007. It's now on its tenth edition. There are some striking differences from the adult list. The children's list currently excludes all medicines for mental and behavioural disorders for children under thirteen. They removed the entire section in 2023.
Corn
Wait. No mental health medicines for children at all?
Herman
Nothing. No ADHD medications, no antidepressants, nothing in that category for children under thirteen. The adult list has a full mental health section. The children's list just has a gap where section twenty-four used to be.
Corn
That seems like a pretty glaring hole for a list that's supposed to cover priority health needs.
Herman
It's controversial. The committee has declined to add methylphenidate for ADHD, citing long-term safety concerns. They rejected brexpiprazole as an add-on for major depression because the incremental benefit was modest. The position seems to be that the evidence base for psychiatric medication in young children is not strong enough to justify listing.
Corn
But untreated childhood mental illness is a priority health need in plenty of countries.
Herman
That's the tension. The list is supposed to be evidence-driven, and if the evidence is thin, the committee won't list the drug. But the absence from the list has real consequences. Countries building their national formularies look at the WHO list and say, okay, no psychiatric medicines for children, we won't stock them either.
Corn
So the gap propagates.
Herman
That's the power of the list. It's a model, not a mandate. WHO is very careful to say that exactly which medicines are regarded as essential remains a national responsibility. But when you're a small country with limited regulatory capacity, the model list is the default. You don't have the resources to do your own independent assessment of every drug, so you adopt the WHO list and adjust at the margins.
Corn
Which means the committee's decisions in Geneva have outsized influence on what medicines are available to billions of people.
Herman
That's the whole ballgame. And the committee knows it. Which is why the process has become more transparent over time. In 1977 they hid their reasoning to avoid fights. Today every application is public, every review is public, and the committee publishes detailed reports explaining their decisions.
Corn
Let's talk about the 2025 update, because that's the current one and I know there was a big decision about the diabetes drugs.
Herman
The GLP-1 agonists. Semaglutide, dulaglutide, liraglutide, all added. Plus tirzepatide, which is the dual GLP-1 and GIP agonist. These are the drugs everyone's been talking about for weight loss. The committee added them for type 2 diabetes with cardiovascular disease or chronic kidney disease, and for obesity with a BMI over thirty.
Corn
But they rejected semaglutide as a standalone obesity treatment.
Herman
Correct. The diabetes indication with cardiovascular or kidney complications got in. The pure obesity indication did not. And the committee explicitly warned that high prices are limiting access to these drugs.
Corn
Which is the recurring theme. Being on the list doesn't mean being obtainable.
Herman
That's the thing about the 2002 shift. Before 2002, affordability was a precondition for listing. If a drug was too expensive, it didn't get on the list, period. That meant the list was realistic but also conservative. It excluded expensive drugs that were essential.
Corn
So they changed the rule.
Herman
They flipped it. Affordability went from being a precondition to being a consequence. A cost-effective but expensive medicine can now be listed, with the implication that listing creates pressure to make it affordable. The first example was first-line antiretrovirals for HIV. Added in 2002 at over a thousand dollars per patient per year. By 2007 they cost under a hundred dollars.
Corn
The list became a price negotiation lever.
Herman
That's the strategic genius of it. You put the drug on the list, you signal to every country that this is essential, and then the generic manufacturers, the procurement agencies, the international funders all align around it. The price comes down because the demand is consolidated.
Corn
So the list is doing market shaping, not just rationing.
Herman
Both at once. It rations attention. It says to the world, these five hundred and twenty-three medicines are the ones that matter for adults, focus your procurement, your regulation, your generic manufacturing on these. And at the same time it creates a floor of demand that makes it worth a generic manufacturer's while to produce the drug.
Corn
The 2025 update also added some cancer drugs, right?
Herman
Pembrolizumab for metastatic cervical, colorectal, and non-small cell lung cancer. With atezolizumab and cemiplimab as alternatives. These are checkpoint inhibitors, immunotherapy drugs. Very expensive. The committee has a rule that cancer medicines must prolong life by at least four to six months to be listed.
Corn
Four to six months is the bar.
Herman
That's the threshold. And even with that bar, very few cancer drugs make the list. Cancer medicines are about half of all new regulatory approvals, but only a handful are on the essential medicines list. The committee is extremely selective.
Corn
Because most new cancer drugs extend life by weeks, not months, and cost a fortune.
Herman
And the committee is asking a different question than a regulator. A drug regulator asks, is this safe and does it work. The essential medicines committee asks, does this work well enough to justify displacing something else from the list. It's a zero-sum game. Adding a drug means a country's procurement budget has to stretch further.
Corn
The cystic fibrosis drug got in too, didn't it?
Herman
Trikafta. The elexacaftor, tezacaftor, ivacaftor combination. That's a genuine breakthrough for cystic fibrosis, and it's on the list now. Also cytisine for nicotine addiction, which is interesting because cytisine is an old, cheap drug that's been used in Eastern Europe for decades. It's dramatically cheaper than varenicline or nicotine replacement.
Corn
So the list isn't all expensive new biologics. Sometimes it's an old Soviet-bloc drug that got overlooked.
Herman
And that's the beauty of the process. The committee isn't chasing novelty. They're asking what works, what's cost-effective, what can actually be delivered. Cytisine is a perfect essential medicine. It's cheap, it's effective, it's been used for decades, and it was invisible to most of the world because it was developed and marketed in a different system.
Corn
Let's get to the emergency angle, because that's what Daniel was actually asking about. The skeleton framework for emergency medicine.
Herman
The Interagency Emergency Health Kit. That's the flagship. The 2024 version is designed to provide medicines and equipment for ten thousand people for three months. It's structured as ten basic modules, each covering a thousand people, plus one supplementary module.
Corn
Ten thousand people for three months. That's a very specific number.
Herman
It's designed to be deployed in the first phase of an emergency, before the regular supply chain is re-established. The kit is held in stock by major generic suppliers, most of whom can ship within forty-eight hours of an order.
Corn
So the kit is sitting in warehouses right now, waiting.
Herman
In multiple locations around the world. UN agencies, non-governmental organizations, national governments all use it. When a refugee crisis erupts or an earthquake flattens a region, the kit is what gets loaded onto trucks and planes in the first days.
Corn
And the contents are based on the essential medicines list.
Herman
Primarily. The kit contents are derived from the essential medicines list plus WHO treatment guidelines for specific conditions. But the kit is a separate catalogue. It's purpose-built for emergencies, not just a subset of the list. There are also specific kits for cholera, pneumonia, measles, major trauma, non-communicable diseases, and transfusion.
Corn
So the essential medicines list is the foundation, and the emergency kits are the application.
Herman
That's the precise relationship. Daniel's framing was directionally right. The list is the skeleton. The emergency kits are the skeleton with muscles and skin attached, optimized for a specific scenario.
Corn
What about refugee settings? UNHCR has its own list, doesn't it?
Herman
UNHCR maintains its own Essential Medicines and Medical Supplies List, developed after cross-referencing the WHO model list. It's tailored to refugee camp settings, where you have a captive population with specific disease patterns and limited infrastructure.
Corn
So there's a whole ecosystem of lists built on top of the WHO list.
Herman
National lists, emergency kits, refugee lists, disease-specific kits. The WHO list is the trunk, and all these other things are branches.
Corn
Let's talk about the actual numbers on access, because I think that's where the rubber meets the road.
Herman
About two billion people lack regular access to essential medicines. That's the estimate from WHO. And in low and lower-middle income countries, the Global Health Observatory found that only eight to forty-one percent of health facilities had a core set of essential medicines available and affordable.
Corn
Eight percent. That's the low end.
Herman
Eight percent of facilities in some countries have the core medicines available and affordable. So you have a list that's been carefully curated for fifty years, and in the poorest places, fewer than one in ten health facilities can actually stock the basics.
Corn
That's the gap between the list and the reality.
Herman
And it's not a knowledge problem. The list is well known. The problem is financing, supply chains, regulatory capacity, corruption, all the unglamorous stuff. The list is necessary but not sufficient.
Corn
Which is probably why WHO keeps emphasizing that the list is a tool, not a solution.
Herman
The 2025 announcement quoted their director of policy and standards saying that achieving equitable access requires a coherent health system response backed by strong political will. That's WHO-speak for, the list alone doesn't fix anything.
Corn
Let me ask you something about the selection process itself. The committee reviews fifty-nine applications in a week. That's a lot of decisions in a short time.
Herman
The 2025 committee reviewed fifty-nine applications, including thirty-one proposals for new medicines or classes. Added twenty to the adult list, fifteen to the children's list. The committee meets for five days. That's the same length as the first meeting in 1977.
Corn
Five days to decide what billions of people will have access to.
Herman
The committee members do enormous preparatory work before the meeting. They read the applications, review the evidence, consult with experts. The week in Geneva is for deliberation and decision, not for doing the homework.
Corn
Still, it's a remarkable concentration of decision-making power.
Herman
It is. And the committee is not elected. It's appointed by WHO. The members are experts in clinical pharmacology, public health, evidence-based medicine. They're supposed to be independent, not representing their countries or any commercial interest.
Corn
But they're mostly from wealthy countries, I assume.
Herman
The membership has diversified since 1977. There are now members from all WHO regions. But the expertise tends to cluster in academic institutions that are concentrated in high-income countries. That's a structural problem, not a conspiracy.
Corn
It's the same problem as the first committee. The people with the credentials to evaluate medicines tend to be trained in the places where the medicines are developed.
Herman
And the perspective matters. A clinical pharmacologist at a European university may not fully appreciate what it means to stock a medicine in a clinic with no reliable cold chain. That's why the committee also includes people with field experience in low-resource settings.
Corn
Let's talk about what the list actually looks like. Five hundred and twenty-three medicines. How is it organized?
Herman
By therapeutic category. Anaesthetics, analgesics, anti-infectives, cardiovascular medicines, dermatologicals, and so on. Each medicine is listed by its international nonproprietary name, not by brand name.
Corn
So it's generic names only.
Herman
The list doesn't care who makes the drug. It cares what the active ingredient is. That's part of why it works as a market-shaping tool. It's brand-agnostic by design.
Corn
And the medicines on the list are supposed to be available at all times, in adequate amounts, in the appropriate dosage forms, at a price the individual and the community can afford.
Herman
That's the WHO definition of access. It's not just about the list existing. It's about the medicines being physically present, affordable, and of assured quality.
Corn
Quality is a big issue in low-income countries, isn't it? Substandard and falsified medicines.
Herman
Huge issue. The list doesn't solve that problem directly, but it helps by concentrating procurement on a defined set of medicines. When you're buying five hundred medicines instead of five thousand, you can focus your quality assurance resources.
Corn
So the list is also a regulatory simplification tool.
Herman
That's a good way to think about it. A country with limited regulatory capacity can't meaningfully oversee five thousand different medicines. But it can oversee five hundred. The list makes the problem tractable.
Corn
What's the most surprising thing on the current list? Something a listener wouldn't expect.
Herman
Oxygen is on the list. Medical oxygen, as a medicine. It's listed as an essential medicine for the treatment of hypoxaemia. That was reinforced during the pandemic, when oxygen shortages killed people in low-income countries.
Corn
Oxygen as a medicine. That's a good example of the list thinking beyond pills.
Herman
The list includes vaccines, diagnostics, and medical devices. It's not just pharmaceuticals. The full package is about what a health system needs to deliver priority care.
Corn
And what's the most surprising thing that's not on the list?
Herman
For me, it's the children's mental health gap. That's the most glaring omission. But there are also drugs that are widely used in wealthy countries that have never made the list because they fail the cost-effectiveness test.
Corn
Like what?
Herman
A lot of the newer biologics for autoimmune diseases. They're effective, but the price is so high that the committee judges them not cost-effective for the global context. The list is not a list of everything that works. It's a list of everything that works well enough to justify its cost.
Corn
Which is a very different proposition.
Herman
And that's the part most people don't understand about the list. It's not a best-of list. It's a best-value list. The committee is making economic judgments, not just clinical ones.
Corn
So when a new cancer drug gets rejected, it's not because the committee thinks it doesn't work. It's because the committee thinks the cost per month of life gained is too high.
Herman
The four to six month survival threshold is a cost-effectiveness proxy. If a drug extends life by six weeks at a cost of a hundred thousand dollars, it's not going to make the list, no matter how innovative it is.
Corn
Let's go back to the emergency kits for a minute, because that's the part that feels most concrete. The Interagency Emergency Health Kit, ten thousand people for three months. What's actually in it?
Herman
The basic modules contain medicines for the most common conditions in emergency settings. Antibiotics, analgesics, antiparasitics, oral rehydration salts, basic cardiovascular medicines, medicines for respiratory infections, skin conditions, eye infections. Plus basic medical equipment. Syringes, needles, sutures, dressings, basic diagnostic tools.
Corn
So it's a field hospital in boxes.
Herman
It's a primary care system in boxes. It's not designed for surgery or intensive care. It's designed to keep ten thousand people alive for three months while the regular health system is rebuilt or re-established.
Corn
And the supplementary module?
Herman
That's for a more advanced level of care. Additional medicines and equipment that a district hospital might need. It's optional, depending on the setting.
Corn
The forty-eight hour shipping window is remarkable. That means the kits are pre-positioned and ready to go.
Herman
That's the whole point. In an emergency, you don't have time to procure medicines through normal channels. The kit is the buffer stock. It's the difference between having antibiotics on day three and having them on day thirty.
Corn
Which is the difference between life and death in a cholera outbreak.
Herman
Cholera can kill in hours without treatment. The cholera kit is separate from the general emergency kit, and it's designed to be deployed even faster.
Corn
So the system has layers. The essential medicines list is the foundation. The emergency kits are the rapid response layer. The national lists are the routine layer.
Herman
And the disease-specific kits are the specialized layer. It's a coherent architecture, even if the implementation is patchy.
Corn
The 1977 list had about two hundred and twenty medicines. The current list has five hundred and twenty-three. That's growth, but not explosive growth. Over fifty years, the list has roughly doubled.
Herman
Which is actually remarkable restraint, given how many new medicines have been developed in that period. The committee has added an average of about six medicines per year. That's a very conservative rate of expansion.
Corn
So the list has stayed true to its original purpose. It's still a small proportion of all available medicines.
Herman
WHO explicitly says that essential medicines represent only a small proportion of the total number of medicines available globally. The point is selectivity. The list is valuable precisely because it excludes most things.
Corn
There's something almost philosophical about that. The idea that in medicine, as in food, as in disaster supplies, the most important skill is knowing what to leave out.
Herman
And that's the connection to Daniel's food episode. The same logic applies. In a crisis, you don't need the full supermarket. You need the foods that keep people alive. The essential medicines list is the same exercise for drugs.
Corn
The difference is that the food list was about calories and nutrients. The medicine list is about disease burden and cost-effectiveness.
Herman
But the underlying principle is identical. Prioritization under scarcity. You can't stock everything, so you have to decide what matters most.
Corn
Let's talk about the 2025 additions one more time, because the GLP-1 decision is interesting. These are expensive drugs. Semaglutide costs over a thousand dollars a month in the United States.
Herman
And the committee added them anyway. That's the 2002 logic in action. The committee is saying, these drugs are essential for a specific population, and the price needs to come down to make them accessible.
Corn
But the price hasn't come down yet.
Herman
Not meaningfully. The committee acknowledged that high prices are limiting access. The listing creates pressure, but it doesn't guarantee affordability. The ARV story took five years to play out. The GLP-1 story is just beginning.
Corn
And the obesity indication was rejected, which is interesting because obesity affects over a billion people globally.
Herman
The committee's reasoning seems to be that the evidence for obesity treatment is still evolving, and the cost-effectiveness case is not yet clear. For diabetes with cardiovascular or kidney complications, the case is stronger. The drugs prevent heart attacks and kidney failure, which are expensive to treat.
Corn
So it's not just about the drug's effect on the primary condition. It's about the downstream savings.
Herman
That's cost-effectiveness analysis. You look at the total system cost, not just the drug price. If a drug prevents expensive complications, it can be cost-effective even at a high price.
Corn
Which is why the committee needs economists, not just clinicians.
Herman
The committee includes health economists and public health specialists. It's a multidisciplinary exercise.
Corn
Let's talk about the transparency shift one more time, because I think it's one of the most interesting parts of the story. In 1977, the committee hid its reasoning to avoid fights. Today, everything is public.
Herman
And the fights happen anyway. The pharmaceutical industry lobbies hard for its products to be listed. Patient groups advocate for their diseases to be prioritized. The public comment periods are contested.
Corn
But the transparency means the fights happen in the open, with evidence on the table.
Herman
That's the theory. In practice, the evidence is often contested. Different stakeholders interpret the same data differently. The committee has to make a judgment call.
Corn
And that judgment call has consequences for billions of people.
Herman
Which is why the committee's independence matters so much. If the process were captured by commercial interests, the list would lose its credibility. And without credibility, it would lose its influence.
Corn
So the list's power comes from its reputation for being evidence-driven and independent.
Herman
That's the whole game. The list has no enforcement power. WHO can't force any country to adopt it. Its influence comes entirely from its perceived legitimacy.
Corn
And that legitimacy was built over fifty years of careful, conservative, evidence-based decisions.
Herman
With some notable exceptions. The 1977 process was not transparent. The committee was not representative. The list has evolved, and the process has improved. But the legitimacy is real, and it's earned.
Corn
Let's talk about what the list means for a specific country. Say a small country in sub-Saharan Africa is building its national formulary. What does the process look like?
Herman
They start with the WHO list as the baseline. Then they adjust for local disease patterns. If malaria is endemic, they add more antimalarials. If HIV prevalence is high, they prioritize antiretrovirals. They consider their health system capacity. What can their clinics actually deliver? What can their budget afford?
Corn
So it's the WHO list plus local adaptation.
Herman
That's the ideal. In practice, many countries adopt the WHO list with minimal changes, because they lack the capacity for independent assessment. That's why the WHO list matters so much. It's the default for countries that can't do their own homework.
Corn
And the national list then determines what's available in public clinics, what's covered by national insurance, what gets imported.
Herman
The national list is the operational document. The WHO list is the template. The connection between them is direct and consequential.
Corn
In 1977, only about a dozen countries had national essential medicines lists. Today, over a hundred and fifty do.
Herman
Four out of five countries. That's the measure of the list's success. It's become the global standard.
Corn
But the access gap remains. Two billion people without regular access.
Herman
The list solved the intellectual problem. It didn't solve the political and economic problems. Those are harder.
Corn
Which is probably the honest conclusion. The list is a necessary tool, not a sufficient one.
Herman
And that's true of most global health interventions. The technical solution is the easy part. The implementation is where it gets hard.
Corn
Daniel's question about when the list becomes relevant. I think the answer is, it becomes relevant every time a government decides what medicines to buy, every time an aid agency decides what to stock, every time an emergency kit is assembled. It's the invisible infrastructure of global pharmaceutical access.
Herman
And it's been doing that work for fifty years, mostly unnoticed. The list is one of those things that only becomes visible when it fails. When a medicine is missing from a clinic, when an emergency kit doesn't have what's needed, that's when people notice the list exists.
Corn
The absence is the evidence.
Herman
The absence is the evidence. And the list is the attempt to make the absence smaller.

Hilbert: Fifty-nine applications.
Corn
That's the number the committee reviewed.

Hilbert: In 1986 I worked in a pharmacy warehouse in Rotterdam. We stocked four thousand different medicines. The pharmacist would walk the aisles with a clipboard and decide what to reorder based on what had sold. Nobody ever asked whether the four thousand were the right four thousand.
Herman
That's the difference between a market-driven system and a needs-driven system.

Hilbert: The WHO list is a needs-driven system. It starts from the diseases and works backward to the medicines. A warehouse starts from the medicines and works backward to the sales.
Corn
The two systems produce very different outcomes.

Hilbert: The warehouse in Rotterdam had eight different brands of the same blood pressure medicine. All the same molecule. Different boxes, different prices. The pharmacist stocked all eight because different doctors prescribed different brands. Nobody was coordinating.
Herman
That's the therapeutic jungle the WHO list was designed to cut through.

Hilbert: The list says, here's the molecule, here's the dose, this is what matters. The brand is irrelevant. That's the part I always thought was the real innovation. Not the selection, the standardization.
Corn
The list as a coordination mechanism.

Hilbert: It tells everyone what to focus on. The generic manufacturers know what to produce. The procurement agencies know what to buy. The clinics know what to stock. The trainers know what to teach. Without the list, everyone's guessing.
Herman
The guessing is expensive. Money wasted on duplicate brands, on medicines that don't match the disease burden, on products that expire before they're used.

Hilbert: We used to throw away pallets of expired medicines in Rotterdam. Not because they were bad medicines. Because they were the wrong medicines. Ordered on a hunch, or because a sales rep made a good pitch.
Corn
The list is waste reduction as much as anything else.

Hilbert: That's what I'd call it. A way to stop buying things you don't need so you can afford the things you do.
Herman
In a country spending sixty percent of its health budget on medicines, that waste is the difference between treating patients and not treating them.

Hilbert: The warehouse in Rotterdam could afford the waste. A clinic in rural Malawi can't. The list is for the clinic in Malawi.
Corn
Did you ever see the emergency kits in your warehouse days?

Hilbert: Once. A shipment came through for an NGO heading to a refugee camp. Boxes and boxes. All the same size, all numbered. I asked what was in them. The foreman said, everything you need to keep ten thousand people alive for three months.
Herman
That's the Interagency Emergency Health Kit.

Hilbert: I remember thinking, that's a very specific number. Ten thousand people. Three months. Somebody sat down and figured out exactly what that requires. Every box, every vial, every syringe. All planned.
Corn
Somebody did. And they update it every few years.

Hilbert: The 2024 version. I read about it. Ten basic modules, one supplementary. Forty-eight hour shipping. It's a good system.
Herman
It's built on the essential medicines list. That's the connection Daniel was asking about.

Hilbert: The list is the plan. The kit is the execution. You need both.
Corn
The list without the kit is a document. The kit without the list is guesswork.

Hilbert: That's right.
Herman
The other thing the kit does is standardize emergency response. Before the kit existed, every aid agency packed its own supplies. Different medicines, different quantities, different quality. The kit created a common standard.

Hilbert: Like the list did for national formularies. Same idea, different scale.
Corn
Standardization as a form of coordination.

Hilbert: It's the unglamorous part of global health. Nobody gets excited about procurement standards. But that's where the lives are saved or lost.
Herman
The medicines that don't arrive are the ones that kill people. Not the ones that are prescribed wrongly, but the ones that aren't there at all.

Hilbert: In Rotterdam, we had everything. That was the problem. Too much of everything. In the places that actually need the medicines, the problem is the opposite.
Corn
The list is an attempt to fix both problems. It says no to the excess and yes to the essentials.

Hilbert: It's been saying that for fifty years. Longer than I worked in that warehouse.
Herman
Since 1977.

Hilbert: I started at the warehouse in 1986. The list was already nine years old. We didn't use it. Rotterdam didn't need it. But the medicines we shipped to Africa, those were based on the list. The NGOs buying from us used it as their guide.
Corn
Even in the excess, the list was shaping what went where.

Hilbert: That's the thing. The list is like the electrical grid. You don't notice it until the power goes out. But it's there, underneath everything.
Herman
When the power goes out, you're very glad someone built the grid.

Hilbert: The grid is old now. Fifty years. But it still works. That's what I think about when I read about the new updates. The GLP-1 drugs, the cancer drugs. The list is still doing its job. Still making the hard calls.
Corn
Still deciding what matters.

Hilbert: Still deciding what matters. That's the whole thing.
Corn
The cutting room floor detail I keep thinking about is that the 1977 committee met for five days and produced a thirty-six page report that sold out in three months. A technical document that became a bestseller. That tells you something about the appetite for clarity in a confusing world.
Herman
The appetite hasn't gone away. The list still gets attention every time it's updated, because people want to know what made the cut and what didn't.
Corn
The question that stays with me is whether the list can keep up with the pace of pharmaceutical innovation. The 2025 update added twenty medicines, but there are thousands in development. The committee's selectivity is its strength, but it's also a constraint. At some point, the gap between what the list covers and what medicine can do becomes too wide.
Herman
That's the real challenge for the next fifty years. Not whether the list exists, but whether it can adapt fast enough to remain relevant.
Corn
Whether the access gap can be closed. Two billion people is a lot of people to leave behind.
Herman
The list is the map. The journey is still ahead.
Corn
Thanks to Hilbert Flumingtop for producing.
Herman
This has been My Weird Prompts, the human-AI collaboration podcast.
Corn
If you enjoyed this episode, leave us a review wherever you listen. It helps other people find the show.
Herman
We'll be back soon.

This episode was generated with AI assistance. Hosts Herman and Corn are AI personalities.