Study finds counties with highest opioid prescription rates were more likely to favor Donald Trump during the 2016 elections.

NFL players respond to a challenge from President Trump with one of their own, Massachusetts gets its first licensed marijuana cultivator, a US watchdog notes that Afghan opium production is at record highs despite the billions we've spent to suppress it, and more.

A new marijuana poll has the highest support yet for legalization -- and expungement -- a key House GOP chair blocks another reform measure, Canada's marijuana legalization will go into effect October 17, and more.

The congressional shield for medical marijuana states remains alive, New York announces it will add opioid use as a qualifying condition for medical marijuana, and more.

It's the first G7 country to do so.

Canada has become the second country to legalize marijuana after final votes in parliament Tuesday, the Supreme Court agrees to hear an Indiana asset forfeiture case, Eleanor Holmes Norton files a bill to allow marijuana in public housing in states where it's legal, and more.

This helps explain why they are increasingly seen as a valuable treatment for psychiatric disorders such as depression, anxiety, and addiction.

The foodie author serves up a heaping platter of mind-bending science and history.

A second acting DEA administrator is set to resign, New York City Mayor de Blasio has a plan to reduce Big Apple marijuana arrests, the Canadian legalization bill heads for the goal line, and more.