Bloomberg got the $1 billion number by piecing together litigation records, analysts' reports and GSK's own partial statements on the issue. But compare the Paxil situation with those faced by Eli Lilly (LLY) and AstraZeneca (AZN). Both companies have been engaged in litigation that has cost them billions (over the antipsychotics Zyprexa and Seroquel, respectively). And both companies have disclosed the full legal bill attached to those suits. (It's more than $3.3 billion for Lilly and $1.1 billion for AZ .)