A national survey of more than 2,000 high school seniors across the country found that more than 11% used a drug called delta-8 THC in the past year. The psychoactive compound is derived from hemp, ...

Delta-9 is the most abundant form of THC in weed and is responsible for most of the psychoactive effects. Delta-8 acts on the brain the same way but is less potent and has fewer legal restrictions.

Derived from hemp, it has similar effects to delta-9 THC, the main intoxicant in marijuana. It's fueling a rise in calls to poison control. A national survey of more than 2,000 high school seniors ...