Merck tops estimates on Keytruda strength and narrows profit outlook, as it lowers estimated tariff hit

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Merck on Thursday reported third-quarter earnings and revenue that topped estimates as it saw strong demand for its cancer immunotherapy Keytruda. The drugmaker also narrowed its full-year profit outlook to reflect lower estimated tariff costs, among other factors. Shares of Merck fell more than 2% in premarket trading Thursday. Sales of Keytruda topped $8 billion for the first time in a quarter, rising 10% from the same period a year ago. Revenue from the drug of $8.14 billion came in just