A psychoactive chemical is a substance that can affect the mind and the way a person thinks, feels, or acts. It can alter a person's mood, perception, or consciousness. Full definition
THC (the primary psychoactive chemical in cannabis) levels in marijuana tend to be between 10 to 30 percent, while THC levels in hemp tend to be less than 1 percent. (votehemp.com)
The same problem shows up in the new wave of psychoactive chemicals mass - produced overseas. (discovermagazine.com)
The primary psychoactive chemical in Kona is caffeine, an adenosine antagonist that is known for its stimulant effects. (bigrockcoffee.com)