You’ve seen the ads on television soliciting calls to law firms from people who’ve used this or that medicine. Now the lawsuit has been filed. A St. Louis law firm has filed one of the first class action lawsuits in the country against Pfizer, the company that makes Celebrex, the arthritis medication. The lawsuit has been filed in Illinois. It wants Pfizer to pay for any upcoming medical examinations to detect any injuries or disease that might have been caused by Celebrex.