Workplace users of stimulants may appear, at first, to be normal and may even be "good" workers for a while. But, over time, these drug users will begin to exhibit the bad behaviors discussed
Cocaine, including "crack," is a commonly used stimulant among illegal drug users.
Immediately after use, cocaine users feel a "high" which makes them believe that they can work or play harder, longer, and better.
Habitual users may become very paranoid and even violent while they are high.