LONDON (Reuters) - Patients taking the Sanofi-Aventis anti-obesity drug Acomplia have well over double the risk of depression and anxiety, researchers said, adding to the bad news for a drug already linked to suicidal thoughts.Danish researchers reviewed four studies featuring 4,105 patients and found that people taking 20 milligrams per day of the drug were 2.5 times more likely to discontinue treatment due to depressive disorders and three times more likely to stop because of anxiety than those who received a placebo.