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Emily Kwong
You're listening to Short Wave from npr. Hey, short waivers. I am here with NPR pharmaceuticals correspondent Sidney Lupkin today to talk about something that has really changed the game when it comes to weight loss, which is injections. When did this all start?
Sidney Lupkin
I mean, it all started with celebrity weight loss.
Emily Kwong
One hot topic everyone in Hollywood still seems to be talking about is Ozempic.
Andrea Treina
You're on Ozempic or one of those things or Wegovy or whatever or you got work done. Like just, just stop.
Sidney Lupkin
Then it wasn't a secret anymore.
Emily Kwong
Yeah, I remember even Serena Williams came forward as like a spokesperson for the telehealth company. Rose GLP1 injections. I knew my body was missing something it needed.
Sidney Lupkin
For me, the answer was GLP1s. Now these weight loss injections called GLP1s are kind of everywhere. Examples include Ozempic, which is kind of the Kleenex of GLP1 drugs but is actually officially for type 2 diabetes, and WeGovy. These are drugs you inject under the skin once a week. And these injectable drugs have become a valuable tool for millions of people trying to get to a healthier weight. We're talking people who've never been able to lose weight and keep it off, finally finding something that works for them.
Emily Kwong
These are clearly life changing medications and also it seems a big commitment. I mean, not everyone is going to want to inject something weekly for weight loss for sure.
Sidney Lupkin
And you know, they're not for everyone or for every wallet. Injectables do have a sticker price of over $1,000 a month and insurance coverage has been tricky to navigate for a lot of. So there's a lot of excitement around a new pill form of the drug. We're going to talk about two types of these pills. The first is a WeGovy pill that's expected to win FDA approval by the end of the year. And then there's another kind of obesity pill that could be right behind it.
Emily Kwong
Today on the show, a new era of weight loss medications. We talk about the science behind the.
Sidney Lupkin
Experimental pills and what FDA approval would mean for affordability and access.
Emily Kwong
You're listening to Short Wave, the science podcast from npr.
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Emily Kwong
Okay Sunny, I want to talk about GLP1s. Am I saying that right? GLP1 GLP1s. How do they work?
Sidney Lupkin
So yeah, I talked about this with Andrea Treina. Her background is in clinical pharmacy and now she's an obesity director at Novo Nordisk. That's the company that makes Ozempic and Wegovy. And Emily, at my request, she went full frizzle during our interview.
Emily Kwong
So like the magic school bus Ms. Frizzle.
Sidney Lupkin
That is correct.
Emily Kwong
Our generation science teacher 100%.
Sidney Lupkin
Here is her primer on GLP1s and GLP1, by the way, is a hormone your body naturally makes. It stands for glucagon, like pest peptide 1.
Andrea Treina
As soon as you ingest food, your body is gonna start secreting GLP1 because it immediately triggers that oh, you've ingested some food and so it's gonna tell your brain you're eating and so it's gonna make sure it triggers that effect so that you start to feel full. But it's very short acting and only lasts a couple of minutes.
Emily Kwong
Oh, okay. So in our bodies, the GLP1 hormone does a good job of making you feel satisfied, but only for a short time. How does GLP1 medication work differently?
Sidney Lupkin
It much longer. When Novo Nordisk made its medication version of GLP1, the company tweaked it. The active ingredient in both blockbuster drugs, Ozempic and Wegovy is called Semaglutide. Andrea explained how they made it.
Andrea Treina
We took out a couple of amino acids and exchanged them for other ones so that the molecule can't immediately be degraded by the enzyme that our body naturally makes to break it down. And then the second thing we did is we added a big fatty acid chain to the end of it so that it binds to protein and hangs out in the body for longer. So semaglutide actually has a half life of a week instead of just two minutes.
Emily Kwong
Oh, okay. So this is why the retooling of the GLP1 hormone is why Ozempic and similar injectables are taken weekly. Because the chemical at the core of it all, semaglutide, has a half life of a week.
Sidney Lupkin
Right. By the way, there are four different blockbuster injectables. Ozempic and Mounjaro are for type 2 diabetes, and WeGovy and Zepbound are for obesity. But the latest twist is that now there's a possibility of a pill. Two pills, actually. And to be clear, we're not talking about Rubelsis, which is a semaglutide pill, but it's approved for type 2 diabetes.
Emily Kwong
Got it. Okay, these are two new pills, folks. A semaglutide you can swallow and another different pill which is a new compound. Which pill do you want to talk about first?
Sidney Lupkin
Let's talk about the pill made by Novo Nordisk, whose active ingredient is semaglutide. It's a peptide, a protein.
Emily Kwong
Okay.
Sidney Lupkin
The problem is that in your stomach, the drug gets broken down too efficiently and too fast for the semagluti to get into the bloodstream and do its job all over your body. Andrea says to think about how your stomach breaks down some chicken that you've eaten.
Andrea Treina
Our body is trained to release enzymes and to attack those proteins almost immediately, to break them down into smaller pieces so that they can be absorbed. So for 100 years, we've been trying to make a protein, a peptide based molecule able to be absorbed orally.
Emily Kwong
This sounds like a tricky design problem. So how did the scientists at Novo Nordisk get around this and make that peptide based molecule that our bodies wouldn't immediately want to break down?
Sidney Lupkin
Yeah, they added something to it.
Andrea Treina
It is a very long chemical name, but it is abbreviated as snac.
Sidney Lupkin
S, N, A, C. Adorable.
Andrea Treina
Isn't that cute? Thank goodness. No pun intended. But it is just the first letter from each of the chemicals within the structure. And it just worked out to be snack.
Sidney Lupkin
And I love that. And I also love that.
Emily Kwong
Okay, how does the snack pill take a ride through your body? Please be my Ms. Frizzle.
Sidney Lupkin
I'll let Andrea explain it. But the gist is that this snack thing creates a little protective buffer zone around the pill to keep it from getting broken down too quickly and help it get absorbed into the bloodstream.
Andrea Treina
When you swallow that tablet, it creates a tiny little micro environment at the base of the stomach right where that tablet sits. And so it's kind of, if you think about dropping an Alka Seltzer tablet in a glass of water, that immediate fizzy reaction that occurs, that is what happens in your stomach. As soon as this tablet hits the base of your stomach, hits that stomach wall, it creates this little foamy environment directly, directly around the tablet.
Emily Kwong
Mmm.
Sidney Lupkin
Then it can do all those other things to make you feel full and regulate blood sugar. The catch is that you have to take this pill on an empty stomach and wait 30 minutes before eating anything else for it to work.
Emily Kwong
That's very specific. So this pill might not be for everyone.
Sidney Lupkin
Yeah, I definitely heard from people who were, like, past the injection is working for me. I'm good. I don't want this. But others were curious.
Emily Kwong
Now, earlier you had mentioned there was another pill that might come onto the scene. Who is making that one?
Sidney Lupkin
So that one is made by Eli Lilly, which makes the injectables Manjaro and Zepbound, and they both share the same active ingredient, called Tirzepatide. But unlike Novo Nordisk, which took its injectable active ingredient and made it in pill form with some tweaks.
Unidentified NPR Staff or Sponsor Voice
Yeah.
Sidney Lupkin
Eli Lilly is doing a whole new.
Emily Kwong
Active ingredient, a whole new compound for their pill formation. Okay, how does it work?
Sidney Lupkin
Eli Lilly isn't saying in detail yet, but I can tell you this. It is not a peptide. So it doesn't have the same restrictions around when you need to take it. You don't have to take it on an empty stomach and wait half an hour before eating anything.
Emily Kwong
That seems kind of nice.
Sidney Lupkin
Yeah, but its approval is probably a little ways behind the Novo Nordisk pill. And maybe here is a good place to spell out just how long the development and approval process for these drugs can be. I talked to Dr. Max Denning at Eli Lill, who's a senior medical director at the company and worked on studying the new pill.
Dr. Max Denning
You need a huge number of doctors, you need a huge number of sites to be participating in the clinical trials to get all of that data and make sure that this is safe and effective medication.
Emily Kwong
Okay, so Eli Lilly's putting their pill through clinical trials. Does this guy get to meet the patients?
Sidney Lupkin
Actually, never. His job was to design and oversee clinical trials for the pill and then step back. The trials are double blind, meaning that neither the patient nor the doctors know who got the drug and who got the placebo.
Dr. Max Denning
So you design these trials, you spend maybe six months doing that, you start them up and then you run the trial. And that process of finding all of the participants that come for all of their visits, take the investigational medicine as prescribed, then get to the end of the study. That whole process takes maybe two, two and a half years. And for me, the anticipation coming up to that first moment when the data card flips over and you see, does this medicine work?
Sidney Lupkin
Ooh, well, does it work also?
Emily Kwong
What is this pill called, by the way?
Sidney Lupkin
Oh, it's called Orfagliparon. And it did work. According to one study, patients who took Orphaglipron had 12% average weight loss at its highest dose over 72 weeks. And another study showed it it was also effective at lowering patients A1C, which is a measure of blood sugar.
Emily Kwong
Okay. How does this pill's efficacy compare to its competitor, the pill made by Novo Nordisk?
Sidney Lupkin
Novo Nordisk may have a bit of an edge here. In a study published in September in the New England Journal of medicine, a 25mg semaglutide pill led to a 16, 17% reduction in weight on average over 64 weeks. And that's about the same as WeGovy.
Emily Kwong
Oh, so the pill performed about as well as the injectable.
Sidney Lupkin
Yeah.
Emily Kwong
So, big picture. As a pharmaceuticals person, I know you've talked to many people over the years about GLP1 drugs. What do patients think of this?
Sidney Lupkin
Some just aren't into the idea. They're like, hey, the injections work for me. Why would I switch?
Emily Kwong
Yeah.
Sidney Lupkin
But overall, the pill is another option, and that's big, especially when it comes to cost.
Unidentified NPR Staff or Sponsor Voice
Yeah.
Emily Kwong
You said earlier that injectables can be over $1,000 a month, certainly a few hundred dollars a month, depending on your situation.
Sidney Lupkin
And that's on top of already high insurance premiums. So even if you have insurance coverage, it might be really limited or still require a big out of pocket payment.
Emily Kwong
Yeah. So are the pills going to be cheaper?
Sidney Lupkin
So we don't officially know what the sticker price for the pills is going to be yet. Novo Nordisk has not said, Eli Lilly has not said. But generally, pills are easier to manufacture, therefore they're cheaper to manufacture, which could result in a downstream lower price. We also know that there have been deals with the Trump administration announced earlier this year to sell the pills to consumers not using their health insurance for $149 a month.
Emily Kwong
Wow.
Sidney Lupkin
Now, that is not a sticker price, but it could mean that a lower sticker price is coming, and that could mean better insurance coverage, more access, basically just more people able to get their hands on these if they need them.
Emily Kwong
Sidney Lupkin, thank you so much for joining us.
Sidney Lupkin
Thank you for having me.
Emily Kwong
This episode was produced by Rachel Carlson and edited by Brent Baughman. Tyler Jones checked the facts. The audio engineer was Kwesi Lee. Beth Donovan is our vice president of podcasting. I'm Emily Kwong. Thank you for listening to Short Wave from NPR.
Dr. Max Denning
Foreign.
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This episode explores the next chapter in weight loss drugs: the transition of GLP-1 medications from injectables to pills. Pharmaceutical correspondent Sidney Lupkin discusses the science behind GLP-1 drugs, the challenges of creating an oral version, the two leading new pills heading to market, and what the shift could mean for cost and access to obesity therapies.
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This episode paints a hopeful picture of the next phase of weight loss medication, with major breakthroughs bringing pill formulations to market. This could democratize access thanks to easier dosing and potentially lower prices, all while maintaining or even improving the efficacy currently seen with injections. As the science and pharmaceutical landscape shifts, patients and clinicians will have more choices than ever for obesity therapy.
For listeners wanting the essential points:
Episode hosted by Emily Kwong & Sidney Lupkin, produced by the Short Wave team at NPR.