In a trio of recent decisions arising out of cases alleging that an antipsychotic medication, Risperdal, and its generic, risperidone, had caused gynecomastia (breast tissue growth) in men, the United States District Court for the District of Delaware granted motions for summary judgment for defendant Janssen Pharmaceuticals, Inc. The three opinions clarify that Delaware law would not impose innovator liability on a branded drug manufacturer when the plaintiff had used only a generic drug, and addressed “but-for” warnings causation and proximate cause in prescription drug products liability cases. [Disclosure: Drinker Biddle & Reath. LLP attorneys were co-counsel of record in these cases for Janssen.]