Polysubstance use involving illegal drugs occurs in about what percentage of U.S. illegal drug users?
A) 20 percent
B) 40 percent
C) 60 percent
D) as many as 90 percent

Question

Quizplus · Accepted Answer

Studies show that polysubstance use involving illegal drugs occurs in as many as 90% of U.S. illegal drug users. This means that the majority of individuals who use illegal drugs are not just using one substance, but are using multiple substances in combination.

Polysubstance Use Involving Illegal Drugs Occurs in About What Percentage