Methadone is only approved in treatment settings for opiate addiction, and cannot be utilized as a form of addiction treatment for any other type of drug.
Studies indicate that most of the damage caused by most drugs will eventually heal when the individual stops using them; this is not the case with the abuse of inhalants.
PCP's effects can vary from person to person and dose to dose, mainly because of significant variations in amount and composition of active compounds.
Some LSD users have reported feeling compelled to take the drug repeatedly.