Immediately after use, there is an intense sensation, called a “rush” or “flash,” that is described as extremely pleasurable, but it only lasts for a few minutes. After the initial “high,” there is typically a state of severe agitation that in some individuals can lead to violent behavior, paranoia or hallucinations. Other possible immediate effects include increased wakefulness and insomnia, decreased appetite, irritability/aggression, anxiety, nervousness.
Some people say cocaine helps them perform simple physical and mental tasks more quickly or gives them feelings of extreme happiness and high energy. Some say they use it for Attention Deficit Disorder because they falsely believe it helps them concentrate and focus. It doesn’t.
Cocaine’s effects appear almost immediately and disappear within a few minutes to an hour. People binge on cocaine—taking the drug repeatedly within a short time, at increasingly higher doses to maintain their high.