Kwaak v. Pfizer, Inc.

Sherry Kwaak and Jerry Natale, by separate complaints filed in Superior Court, sued Pfizer, Inc. (Pfizer), the *294manufacturer of Listerine brand mouthwash (Listerine), alleging that a Listerine advertising campaign that claimed that Listerine was “as effective as floss” was deceptive, violated G. L. c. 93A, § 2, and thus caused them and others similarly situated economic injury. The plaintiffs sought certification of a class of all Massachusetts consumers who purchased Listerine during the advertising campaign. A Superior Court judge allowed a motion for class certification under both…