Many studies confirm that chronic Ecstasy use can result in a myriad of mental changes, and individuals who use the drug in this way typically score significantly higher on measures of obsessive traits, anxiety, paranoid thoughts, and disturbed sleep, among others.
LSD may cause permanent brain damage in some users.
Oxycontin withdrawal symptoms typically begin as soon as six hours after the last dose and can last up to one week.
More than a third of marijuana treatment admissions in the U.S. refrain from using the drug in the month prior to admission.