Bayer AG has suspended sales of Trasylol, an anti-bleeding drug, at the request of  the FDA and foreign health officials pending further analysis of a Canadian study that suggests it’s linked to a 50% higher risk of death than the other drugs in the trial.     Trasylol, also known as aprotinin, is used to prevent excessive bleeding during heart bypass surgery. The Canadian study comparing the safety and efficacy of Trasylol with two other drugs was stopped when preliminary results sugge...