ATLANTA--Healtheon/WebMD sued a Web site operator for allegedly using the domain name "wbmd.com" to direct Internet traffic toward sites selling prescription drugs and sex toys. James Michael Smith has been using the "wbmd.com" Web site to route visitors to other sites, including one that sells prescription drugs Viagra and Propecia, the lawsuit contends. Visitors have also been routed to a Web site that sells pornographic materials and provides access to online sex shows, according to the lawsuit filed May 24 in federal court in Atlanta. Atlanta-based Healtheon says it uses its WebMD.com site to offer a variety of health care-related services, including a medical library and online discussions. Smith's Web site, the lawsuit contends, is likely to injure Healtheon's business reputation by confusing users into thinking Healtheon is connected with Smith's services. Smith registered a "confusingly similar" domain name "with the bad faith intent of profiting unlawfully," Healtheon says in the lawsuit. Smith said in a telephone interview June 13 that he shut down the Web site after he learned of the suit against him. "What you've got here is a large corporation with a team of lawyers that can get their way with a smaller company," said Smith, an Atlanta resident. The lawsuit asks a judge to award damages and order Smith to surrender the domain name. Smith has registered several other domain names, including "themedicalsource.com," and others for pornographic sites.