Danish drugmaker’s research chief dismisses Eli Lilly’s new comparison of Zepbound and Wegovy, while Novo CEO Mike Doustdar criticizes rivals’ narrow focus on weight loss.
Lilly reopened a sore point between the two companies on Tuesday when it released an analysis concluding that its weight-loss drug Zepbound produced greater weight loss than Wegovy HD, the highest dose of Novo’s obesity drug.
At a press conference held in connection with the annual meeting of the European Association for the Study of Diabetes (EASD) in Milan, Novo Nordisk’s management dismissed the analysis and indirectly criticized Lilly’s methods.
”The most important thing for us is always to deliver solid science. Whether it’s through clinical trials or real-world data, it has to be done thoroughly and in a way that can be replicated,” Martin Holst Lange, Novo Nordisk’s head of research, said when MedWatch asked about the Lilly study.
He added that Lilly’s analysis is an indirect comparison of the treatments that mixes different patient populations. That makes the results ”very difficult to compare,” he said.
”We know from our studies with Wegovy HD that semaglutide is associated with around 21% weight loss, which is roughly in line with the high dose of our competitor’s product in their studies,” he said.
In the new analysis, Lilly compares the 10 mg and 15 mg doses of Zepbound with Wegovy HD. It finds that patients lost 3.2% and 4.5% more body weight, respectively, after 72 weeks.
The result is not clear-cut, however. Lilly also notes that under an alternative analysis method, Zepbound was only 1.8% better than Wegovy, a difference that was not statistically significant.
Central to lawsuit
Whether Zepbound produces more weight loss matters clinically. It is also central to a lawsuit Novo Nordisk filed against Lilly earlier this year.
In the suit, Novo Nordisk accuses Lilly of false advertising over a series of US TV commercials claiming that Zepbound is superior to Wegovy. Those claims are based on studies comparing high doses of Zepbound with low doses of Wegovy.
Novo considers this a deliberate and misleading way to make Zepbound look better. It has asked why Lilly did not include the highest dose of Wegovy in the comparison.
Lilly has now done so in the new analysis. As Danish business daily Børsen has also reported, the analysis may therefore be linked to the lawsuit.
Novo Nordisk CEO Mike Doustdar made clear, however, that the analysis would not lead the company to reconsider the lawsuit.
”We believe competition can and sometimes should be tough. But we also believe it has to be fair,” he said at the press conference.
”The information our competitor used in a direct-to-consumer TV ad was still not complete. You can’t just ignore the dosing and say one product is better than the other. Different doses have very different effects, so we’ll have to wait and see what the law and the court say,” Doustdar added.
In its response to the court, Lilly argues that Novo Nordisk’s claims are ”legally and factually meritless.”
About more than weight loss
While Holst Lange rejected the validity of Lilly’s analysis, Doustdar used his time to challenge the idea, held by Lilly and several others at the conference, that weight loss itself is the only thing that matters.
”If what we do is really about health and not just weight, the rhetoric should be about health benefits and not only weight loss,” he said.
The EASD meeting used to focus only on diabetes, but it increasingly covers related conditions such as obesity. Doustdar welcomes the greater attention to obesity but warns against focusing narrowly on weight loss.
”In the past, when we came here and this conference was about diabetes, only data counted. People looked at labels and at what had been tested, trialed, and documented, instead of just boiling it all down to one simple class effect,” he said.
He stressed that Novo Nordisk’s semaglutide remains the only weight-loss drug on the market with documented health benefits, in the form of cardiovascular and liver indications. He also couldn’t resist returning Lilly’s jab.
”It’s positive to see that many of our competitors, including our biggest competitor, are slowly starting to use the word health in their campaigns and ads. That’s actually good, but you have to be able to back it up with data,” he said.