Johnson & Johnson officials hid three studies showing some patients using Risperdal developed diabetes while claiming the antipsychotic drug didn’t cause the disease, a witness testified. As early as 1999, Johnson & Johnson’s Janssen unit had researchers’ findings that about half the patients taking Risperdal in a study comparing its risks to those of Eli Lilly & Co.’s Zyprexa antipsychotic drug developed diabetes after a year on the medication, Joseph Glenmullen, a psychiatrist and Harvard Medical School instructor, told a Texas jury yesterday.
