The news came as the Danish drugmaker raised its full-year profit and sales forecasts for a second time.
Wegovy is a weekly injection that can help patients to shed 15% of their weight alongside diet and exercise changes.
Reuters has reported that larger doses are also in short supply, which Novo has denied.
Many analysts had expected Novo to raise earnings guidance, given the huge U.S. demand for the weekly injection.
The company also warned that it expected "continued periodic" supply constraints and drug shortages across a number of products and geographies.
Persons:
Jacob Gronholt, Pedersen, Ozempic, Lars Fruergaard Jorgensen, Novo, " Jorgensen, Henrik Hallengreen Laustsen, Laustsen, Nikolaj Skydsgaard, Josephine Mason, Mark Potter
Organizations:
Novo Nordisk, REUTERS, Reuters, World Health Organization, Jyske Bank, Thomson
Locations:
Novo, Copenhagen, Denmark, U.S, COPENHAGEN, Danish