How GLP-1 weight loss drugs dominated 2023

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Coming in at Number 5 on Yahoo Finance's countdown of the top stories of 2023 is the breakout success of GLP-1 weight loss drugs. This new class of diabetes and obesity medications, led by Novo Nordisk's Wegovy (NVO) and Eli Lilly's Mounjaro (LLY), have shown dramatic weight loss results of 15-20% in clinical trials.

Yahoo Finance Health Reporter Anjalee Khemlani provides an in-depth analysis of the frenzy over these injectable treatments and what's driving the demand. As major pharmaceutical companies like Pfizer (PFE) and Roche (ROG.SW) prepare to enter the market in 2024, she explores what lies ahead.

For more expert insight and the latest market action, click here to watch this full episode of Yahoo Finance Live.

Video Transcript

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- We're counting down the top 10 stories of 2023 here at Yahoo Finance. And coming in at number 5, the weight-loss drug craze.

- Pfizer is entering the weight-loss drug space for the first time.

- Pharma companies Novo Nordisk's, Eli Lilly, and Pfizer are all competing to seek FDA approval of a first in class oral weight-loss and diabetes drug.

- The skyrocketing success of weight-loss drugs like Ozempic has completely upended the $75 billion weight-loss industry.

- Prescription weight-loss drugs in a new study coming out from Goldman Sachs saying that they think the total addressable market globally by 2030 could be $100 billion.

COLLEEN LINDHOLZ: From knowing people that are on those drugs, it's their blockbuster for them, especially if they've tried diets over the years and more of like a kick start in a new lifestyle.

- 2023 was the year more drug companies got in on obesity drugs following the rise in popularity of GLP-1s for diabetes and weight loss. Here with how it all unfolded, we have Yahoo Finance's Anjalee Khemlani. Anjalee.

ANJALEE KHEMLANI: Thank you so much guys. Obviously, weight-loss drugs, GLP-1s in particular were literally everywhere this year from swimsuit season through Thanksgiving. There's literally always a news peg for it. I was never bored. They even had a moment at the Oscars.

- When I look around this room, I can't help but wonder, is Ozempic right for me?

ANJALEE KHEMLANI: And just today, after months of not confirming, Oprah Winfrey acknowledged that she was indeed using a weight-loss drug as a maintenance tool but without naming which one. But first let's address the important difference. There's type 2 diabetes drugs and weight-loss drugs that make up the class of GLP-1 drugs. And that has caused the stir.

The diabetes drugs are Novo Nordisk's Ozempic and Eli Lilly's Mounjaro which are both available off-label for weight loss. GLP-1s have been around since 2005 with Eli Lilly's [INAUDIBLE]. But the newer drugs have set a new bar for weight loss. Novo's drug provides up to 15% weight loss with semaglutide. And then Lilly's drugs in higher doses of tirzepatide can help a person lose more than 20%. So that is really what has started the buzz around the potential drugs.