(Bloomberg) -- Galderma Group AG shares slumped the most in more than a year after the US Food and Drug Administration turned down the Swiss dermatology firm’s rival Botox treatment Relfydess.

(Bloomberg) -- Galderma Group AG shares slumped the most in more than a year after the US Food and Drug Administration turned down the Swiss dermatology firm’s rival Botox…

The FDA declined to approve a biologics license application for Galderma’s relabotulinumtoxinA, citing manufacturing and testing concerns, according to a company press release. In…