Children who grow up in an environment of illicit drug use may first see their parents using drugs.

The report also said there was no evidence that giving the drug to sick people would increase illicit use in the general population.

There is some evidence of chemicals and equipment that could have been put to illicit use.

This includes higher rates of marijuana and other illicit drug use.

The report claims that the economic impact of illicit drug use is $80 billion for health care and productivity.

Some patients appear to return to illicit drug use as a means of self-medication, at least in part.

She made illicit use of drinking water and splattered her face.

What the prison boom has not done, however, is reduce illicit drug use, national surveys show.

"We require the truth, and our investigations suggest illicit use of forbidden science."

Texas authorities linked 13 deaths to illicit use of the medicine in 1998.