From an article last April:
https://www.cnbc.com/2024/04/03/weight-loss-diabetes-drug-ad-spending-tops-1-billion.html
Companies spent more than $1 billion on ads for weight loss and diabetes medicines in 2023, up 51% from the prior year, according to new data from advertising analytics firm MediaRadar. That’s nearly 15% of drugmakers’ $7.6 billion in ad spending for prescription drugs last year.
Diabetes treatments accounted for nearly $790 million in ad spending in 2023, while weight loss drugs made up almost $264 million...
Zepbound...won approval in the U.S. in November [2023], and some analysts say it could eventually become the top-selling drug of all time.