When the drug industry came under fire last summer for failing to disclose poor results from studies of antidepressants, major drug makers promised to provide more information about their research on new medicines...Eli Lilly and some other companies have posted hundreds of trial results on the Web and pledged to disclose all results for all drugs they sell. But other drug makers, including Merck and Pfizer, release less information and are reluctant to add more, citing competitive pressures...the major drug companies in January agreed to expand the number of trials registered on clinicaltrials.gov...But Merck, Pfizer and GlaxoSmithKline, three of the six largest drug companies, have met the letter but not the spirit of that agreement, Dr. Zarin [Deborah Zarin, director of clinicaltrials.gov] said...Pfizer, Merck and GlaxoSmithKline say that they disclose their largest trials, which determine whether a drug will be approved...Rick Koenig, a spokesman for Glaxo, said the company understood the concerns about disclosure and planned to add more information to clinicaltrials.gov. [also refers to Wyeth]