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Shares of Novo Nordisk

rose more than 5% on Friday after early prescription data showed an encouraging start to the U.S. launch of the company’s new GLP-1 pill for obesity.

In a Friday note, TD Cowen analysts called it a “solid start” for the first-ever weight loss pill, but said “one data point does not make a trend.” They cautioned that they need to see more data to fully assess what early demand is like for the Wegovy pill, which officially launched on Jan. 5 after winning approval in late December.

Still, the initial data is a boost to the Danish drugmaker’s hopes of winning back more market share from its chief rival, Eli Lilly