The number of Americans receiving specialty treatment for a problem with nonmedical pain reliever use more than doubled between 2002 and 2010, from 199,000 to over 400,000.
PCP can have sedative effects and the drug may also cause interactions with other central nervous system depressants, such as alcohol and benzodiazepines.
Long-term alcohol abuse can potentially cause an overall reduction in brain size.
Using other drugs or drinking alcohol sometimes trigger flashbacks in individuals who have used LSD