The judge in charge of Philadelphia's Complex Litigation Center has written an opinion supporting his decision to toss 13 Risperdal cases that originated in Michigan.

Supervising Judge Arnold L. New issued an opinion earlier this month in response to an appeal to the Superior Court of 13 consolidated cases against drugmaker Janssen Pharmaceuticals explaining why he decided to apply Michigan law to the cases, all of which involve plaintiffs who were prescribed the antipsychotic Risperdal while living in Michigan. The plaintiffs have contended that the drug causes gynecomastia, a condition where men suffer from enlarged breasts.

In his decision in A.H. Jr. v. Janssen Pharmaceuticals, New determined that Pennsylvania and Michigan law conflicted as to whether the plaintiffs would be able to proceed on various products liability and negligence claims, and determined that Michigan law, which would not allow the claims, should apply.