The change would not legalize the drug on the federal level, but would ease barriers on research using cannabis.

The move to reclassify cannabis from a Schedule I to a Schedule III drug could spark new studies into pain, aging and women's health, Dr. Staci Gruber tells GBH's All Things Considered.

It's known as a party drug of choice: cheap, readily available, and a “really good intensifier”. But ketamine wasn't designed for recreational use - it's a powerful anaesthetic, with a nasty dark side ...