The number of cases involving the anti-psychotic drug Risperdal almost tripled in the first half of 2017, jumping from approximately 2,000 cases at the beginning of the year to more than 5,500 as of June 2017, comprising the largest mass tort litigation in Philadelphia.
The new filings in the Risperdal litigation were largely triggered when Johnson & Johnson terminated tolling agreements on thousands of cases, which had paused the statute of limitations deadline. A Johnson & Johnson subsidiary, Janssen Pharmaceuticals, Inc., manufactures Risperdal.
The Risperdal litigation mostly involves a condition called gynecomastia, which causes breast tissue enlargement in males. Risperdal was originally approved in 1993 to treat schizophrenia in adults. In 2006, clinical studies linked an increased risk of gynecomastia in male adolescents to Risperdal use. The Risperdal gynecomastia lawsuits allege the manufacturer did not sufficiently warn doctors and patients of the male breast growth problem, and that Johnson & Johnson and Janssen Pharmaceuticals failed to properly share information with the FDA.