Halted drug trial safety concerns.BBCnews. April 8, 2008.The benefits of some cancer drugs may be exaggerated as a rising number of trials are stopped early, experts say. Italian researchers analysed 25 trials, including some for the breast cancer therapy Herceptin, that were stopped early between 1997 and 2007. The Mario Negri Institute team said data from many of the recent cases had been used to get drug licences before the long-term impacts were known. But drug firms said finishing trials early saved lives. [ See ]