Pfizer Sues to Block Copies of Smoking-Cessation Pill Chantix

Pfizer said proposed generic versions of smoking-cessation tablets by closely held Viwit infringe three patents for Chantix.

• Pfizer is seeking a court order blocking copies until the patents have expired, and to collect cash compensation if copies are made before then, according to complaint filed Friday in federal court in Wilmington, Delaware
• Patents expire in November 2020, November 2022 and February 2023: FDA Orange Book
• Chantix had U.S. sales of $899 million in 2019, up by 7% from 2018, Pfizer said Jan. 28 in its annual earnings report
• NOTE: Ajanta Pharma sued Pfizer in July 2019, seeking the court’s declaration ...