Two members of the Manchester fire department in New Hampshire assess the condition of a man who had overdosed on heroin and who was revived with two doses of Narcan. Photograph: Don Emmert/AFP/Getty Images

In hindsight, it looks like a no-brainer. Take a tried and tested drug that addresses a burgeoning epidemic and make it easier to use. Then sit back a(...)

A man administers Adapt Pharma’s Narcan as they try to revive a man who overdosed on heroin in Philadelphia. The man later came to and was taken to the hospital. Photograph:  Spencer Platt/Getty Images

Adapt Pharma, the Irish company behind emergency overdose treatment Narcan, has been sold in a $635 million deal. The Irish shareholders of the busin(...)