PCP users may experience feelings of invulnerability and exaggerated strength, and some users may become severely disoriented, violent, or suicidal.
Opiates interfere with the transmission of pain messages in the spinal cord, preventing them from reaching the brain and resulting in pain relief.
The rate of past month marijuana use in the United States among individuals aged 12 or older rose from 6.1% in 2008 to 6.6% in 2009.
Rebound anxiety often occurs following the discontinuation of most benzodiazepines such as Valium, and refers to the recurrence of symptoms of anxiety which typically return to pretreatment levels.