In Cities Where It Once Reigned, Heroin Is Disappearing The rise of the more potent fentanyl in its place has put a generation of older users, who had managed their addiction, at far greater risk of overdose. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Trump Finally Picks a Science Adviser. And Scientists? They Seem Relieved.Eclipse 2018: Third eclipse of summer THIS MONTH - How to see August solar eclipseNew earth’ may support alien lifeBermuda Triangle mystery SOLVED: MONSTER waves to blame for disappearancesEclipse 2018 pictures: Breathtaking Blood Moon pictures snapped by astronauts in spaceDeadly Ebola Strikes Anew, a Week After Previous Outbreak Was Extinguished