After the FDA removed semaglutide injection products from a shortage list, compounders like Hims have 60-90 days to stop making copies.

Hims & Hers said on Monday that it may no longer be able to sell compounded versions of the weight-loss drug made by Novo Nordisk because its pathway to do so closed when the U.S. FDA declared Friday that the drug's shortage was over.

Investors are scrambling to adjust, after the telehealth specialist Hims & Hers said it would stop selling an alternative to Novo Nordisk's Wegovy and Ozempic weight-loss drugs. Hims stock stood about 17% lower at under $42.

One participant lost 22% of her weight in nine months — substantially faster than the rate seen with approved GLP-1 drugs like Wegovy or Zepbound. Her weight dropped so much that researchers reduced her dose of the treatment, called retatrutide. Still, she continued to feel too nauseous, so she decided by herself to start skipping every other dose.