After analyzing data from clinical trials, GlaxoSmithKline has sent letters to doctors warning that its antidepressant drug Paxil appears to increase the risk of suicide attempts in some young adults. The company said it had changed the labeling on the drug to reflect the finding of the study, which analyzed clinical trial data involving some 15,000 people. The study found that reported suicide attempts were rare but significantly more common in adults who took the drug for depression than in those who received placebo pills. The Glaxo researchers reported only one suicide in the trials, a number so small it...