ICD-11 Criteria for Disorders due to use of Unknown or Unspecified Psychoactive Substances (6C4G) Disorders due to use of unknown or unspecified psychoactive substances are characterised by the pattern and consequences of psychoactive substance use when the specific substance is unknown or unspecified. These categories may be used in clinical situations in which it is clear that the disturbance is due to substance use but the specific class of substance is unknown. Once the relevant substance is identified, the disturbance should be recoded under the appropriate substance class. 6C4G.0      Episode of harmful use of unknown or unspecified psychoactive substances An episode of use of an unknown or unspecified psychoactive substance that has caused damage to a person’s physical or mental health or has resulted in behaviour leading to harm to the health of others. Harm to health of the individual occurs due to one or more of the following: (1) behaviour related to intoxication or wi

ICD-11 Criteria for Disorders Due to Use of Multiple Specified Psychoactive Substances Including Medications (6C4F) Disorders due to use of multiple specified psychoactive substances, including medications are characterised by the pattern and consequences of multiple psychoactive substances. Although this grouping is provided for coding purposes, in most clinical situations it is recommended that multiple specific disorders due to substance use be assigned rather than using categories from this grouping. 6C4F.0     Episode of Harmful use of Multiple Specified Psychoactive Substances An episode of use of multiple specified psychoactive substances or medications that are not included in the other substance classes specifically identified under Disorder Due to Substance Use that has caused damage to a person’s physical or mental health or has resulted in behaviour leading to harm to the health of others. Harm to health of the individual occurs due to one or more of the following: (1

ICD-11 Criteria for Disorders Due to Use of Other Specified Psychoactive Substances, Including Medications (6C4E) Disorders due to use of other specified psychoactive substances, including medications are characterised by the pattern and consequences of psychoactive substances that are not included among the major substance classes specifically identified. Examples include khat, anabolic steroids, corticosteroids, antidepressants, medications with anticholinergic properties (e.g., benztropine), and some antihistamines. 6C4E.0     Episode of Harmful use of Other Specified Psychoactive Substance An episode of use of a specified psychoactive substance or medication that is not included in the other substance classes specifically identified under Disorders Due to Substance Use that has caused damage to a person’s physical or mental health or has resulted in behaviour leading to harm to the health of others. Harm to health of the individual occurs due to one or more of the following: