A team of Japanese scientists has developed a new painkiller they say is as effective as fentanyl but without its addictive properties, a breakthrough that could reshape the fight against the global opioid crisis if clinical trials succeed.The team from Kyoto University has been working on the project for 13 years, with phase one clinical trials already proving successful and phase two trials due to start soon.Masatoshi Hagiwara, a professor of pharmaceutical medicine at the university, hopes...