In the 1970’s, British researcher tested the IQ’s of 8000 children, aged 5 to 10 years. Then, they collected information about the individuals’ level of drug use and psychological stress at age 16 and then again at age 30.
As it turns out, males who had a relatively high IQ score at age 5, were 50% more likely to have taken “hard” drugs like ecstasy and amphetamines 25 years later when compared with men who had relatively low IQ scores. Females with high IQ scores were twice as likely to have used cocain and cannabis later in life than their less intellectually gifted counterparts.
These stats persisted even when parental social class, life time household income, and anxiety and depression during adolescence was taken into account. There is no clear, accepted explanation for the correlation between high intelligence and drug use.
While it is possible that there is no direct correlation in the first place but some researchers hypothesize that it may be because individuals with high intelligence are more easily bored and more open to stimulation-no matter how deadly.