From CNN:
Pfizer faces Canadian suit over drug Celebrex
A Canadian class-action lawsuit has been launched against Pfizer Inc. alleging that its arthritis drug Celebrex caused cardiovascular side effects, the law firm launching the suit said Friday.

Shares of Pfizer (down $0.22 to $28.84, Research), a member of the Dow Jones industrial average, were down 0.65 percent in afternoon trading on the New York Stock Exchange.

The Saskatchewan-based Merchant Law Group included Pfizer's Bextra in its suit and also named Boehringer Ingelheim, Germany's largest pharmaceutical firm, for its Mobicox, in the same class of drugs.