Novo Nordisk cautioned on Wednesday that it expects continued competition this year from copycat versions of its Wegovy obesity drug, as it battled pressure from compounding pharmacies in the United States and rival Eli Lilly.

Second-quarter sales of the blockbuster drug soared 67% on year, despite millions of U.S. patients using generic unbranded versions of the drug.

Sales of Novo Nordisk's blockbuster Wegovy obesity drug rose 67% in the second quarter despite continued competition from compounded drug makers. The pharma giant last week cut its full-year guidance and named Mike Doustdar as its new CEO.