Most crack users smoke the drug, although in rare cases it can be injected.
Individuals who have taken an antidepressant drug for longer than 6 weeks are particularly at risk of withdrawal if they abruptly stop taking the drug.
Studies indicate that there is a higher prevalence of methamphetamine use among gay males than among the general population in the United States.
Magic mushrooms used most often at dance parties, clubs and, increasingly, on college campuses and generally are abused by teenagers and young adults.