It is not uncommon for methamphetamine addicted individuals to display compulsive action, such as cleaning and grooming or sorting and disassembling objects.
Long term abuse of alcohol has been found to damage the frontal lobes of the brain.
Percocet addiction is can be characterized by a pattern of compulsive use, despite undesirable side effects and other consequences.
Recreational marijuana users commonly site their main purpose for using marijuana is to reach a social high and to relax, enhance activity, decrease boredom, increase confidence, reduce anxiety and feel better in general.