Concurrent Disorders:

The presence of one or more primary, physical and/or psychiatric disorders that have an interactive effect on the course of Substance Dependence and require specific diagnosis and treatment in order to achieve stabilization and/or recovery. (Adopted Canadian Society of Addiction Medicine October 14, 1999)

Controlled Substance:

There are many controlled substances listed under the Controlled Substance Act. These drugs are grouped under schedules. Below are examples of some of the better known drugs within each Schedule:

• Schedule I contains drugs made from the opium poppy such as heroin, codeine; drugs made from coca such as cocaine; and synthetically derived drugs such as methadone.
• Schedule II contains cannabis (marijuana) and its derivatives.
• Schedule III contains drugs such as amphetamines and lysergic acid diethylamide (LDS). 
• Schedule IV contains drugs such as benzodiazepines and barbiturates.
• Schedule V and VI contain precursors required to produce controlled substances (NationalAssociation of Pharmacy Regulatory Authorities, 2002-2004).