Pfizer was hit with a consumer class action Tuesday in Florida Southern District Court over the company's generic version of the anti-smoking drug Chantix. The lawsuit, filed by Rivero Mestre LLP, claims that Pfizer's drug, known generically as varenicline, contains carcinogens and is ineffective. Counsel have not yet appeared for the defendant. The case is 1:21-cv-23676, MSP Recovery Claims Series 44, LLC et al v. Pfizer, Inc.