Lindsay Lohan

From what research I've done, very casual use doesn't have any long term effects (unless of course you have a heart attack from an all night binge). Pretty much once it's out of your system, the negativity is over and the body repairs itself. Chronic usage can indeed have longterm, permanent effects.

Thank you...
 
I beg to differ, that's all ;)

The short-term physiological effects of cocaine include constricted blood vessels; dilated pupils; and increased temperature, heart rate, and blood pressure. Large amounts (several hundred milligrams or more) intensify the user’s high, but may also lead to bizarre, erratic, and violent behavior. These users may experience tremors, vertigo, muscle twitches, paranoia, or, with repeated doses, a toxic reaction closely resembling amphetamine poisoning. Some users of cocaine report feelings of restlessness, irritability, and anxiety. In rare instances, sudden death can occur on the first use of cocaine or unexpectedly thereafter. Cocaine-related deaths are often a result of cardiac arrest or seizures followed by respiratory arrest.
credit source:
http://www.nida.nih.gov/ResearchReports/Cocaine/cocaine3.html#short