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Danish drug developer Novo Nordisk on Wednesday (February 1) warned of supply constraints on its best-selling drug. The company, which develops diabetes and obesity drugs, said it expected "periodic supply constraints" this year, partly driven by higher than expected demand for its blockbuster diabetes drug, Ozempic, and manufacturing constraints. "Supply of Ozempic cannot keep up with demand in some markets," Novo's Chief Financial Officer Karsten Munk Knudsen told journalists on Wednesday, but said Ozempic was available in the United States, the firm's biggest single market. Shortages of human growth hormone would also cause sales in its rare disease franchise to drop by a "mid-single digit" percentage in 2023, as its Norditropin drug would be out of stock in certain markets, Knudsen said.

Diabetes drugs that also promote weight loss such as Novo Nordisk's Ozempic, becoming a darling of celebrities and investors, are being studied to tackle some of the most difficult-to-treat brain disorders, including Alzheimer's disease. Diabetes regimens, from Ozempic to old mainstays like insulin and metformin, appear to address several different aspects of the metabolic system implicated in Alzheimer's disease, including a protein called amyloid and inflammation, researchers say. The hope is that improving glucose utilisation and tamping down inflammation in the entire body - including the brain - could slow progression of debilitating diseases like Alzheimer's and Parkinson's. Several scientists interviewed by Reuters news agency pointed to mounting research supporting testing diabetes drugs against neurodegenerative diseases. Results are years away and success uncertain. But interest has been buoyed by recent positive data on Alzheimer's drugs developed by Eisai with partner Biogen and by Eli Lilly demonstrating that removing sticky amyloid plaques accumulated in the brain can slow cognition decline caused by the fatal mind-wasting disease. Those successes followed decades of futility that had left many questioning the validity of the amyloid theory behind most experimental Alzheimer's drugs.

New data on weight loss drugs that could compete with Novo Nordisk's Wegovy are raising expectations there will soon be more options, and possibly lower prices, in an estimated $100 billion marketplace, doctors and pharmaceutical executives say. Drugmakers are ratcheting up their research and aiming for new formulations that can be taken as pills, options to deliver higher weight loss or drugs that reduce fat while maintaining muscle. "It has really been an explosion of innovation," said Dr. Robert Gabbay, chief science officer at the American Diabetes Association (ADA), which receives funding from both Novo and Eli Lilly and Co and just concluded its annual meeting in San Diego, California. "If there are multiple (treatments) in the market, that will lead to some level of competition and greater access."