Mylan Dealt Court Setback

A judge prevents Mylan from making generic Topamax for now.
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A U.S. District Court granted

Johnson & Johnson's

(JNJ) - Get Report

Ortho-McNeil Neurologics unit a preliminary injunction preventing

Mylan Laboratories

(MYL) - Get Report

from making a generic version of its epilepsy drug Topamax.

The ruling, made by Judge Stanley Chesler of the U.S. District Court in New Jersey, will keep Mylan's version of the drug on hold until the court decides on the validity of the Ortho patent.

In addition to being used for epilepsy, Topamax is also prescribed to prevent migraine headaches in adults. Its patent expires in September 2008.