Perrigo Fails to End Suit Over Fluoride Warning on Mouthwash

Perrigo Co. and Ranir LLC failed to defeat parents’ claims that their mouthwashes, which are designed to appeal to kids, don’t clearly alert consumers that ingesting a key ingredient, fluoride, can harm young children, a federal court ruled Thursday.

Judge Lindsay C. Jenkins, with the US District Court for the Northern District of Illinois, denied the companies’ motion to dismiss a failure-to-warn complaint brought by parents.

The case is among six filed in multiple courts earlier this year against manufactures including the Procter & Gamble Co. and Colgate-Palmolive Co. Plaintiffs in the cases—all of which are ongoing—claim ...