A drug is a substance that can alter the way your body works. It can be a medicine that helps you feel better when you're sick, or a substance that people use to get high. Full definition
Both papers lead with the story of drug use in baseball. (newscientist.com)
I actually read a study where minute particles of drugs used for euthanasia were found in commercial dog food. (fidoseofreality.com)
The contract calls for drug testing for employees when deemed appropriate during work, a change from the previous policy, which required that only new employees be tested. (articles.chicagotribune.com)