________ is one of the most potent of any psychoactive drug with oral doses as low as 25 micrograms producing effects.
a. LSD
b. DMT
c. psilocybin
d. heroin
e. cocaine
Question 2
LSD is thought to act in the brain by influencing __________.
a. serotonin
b. dopamine
c. endorphins
d. norepinephrine