Diagnostic name(s)

• Alcohol use disorder

• Cannabis use disorder

• Hallucinogen use disorder

• Inhalant use disorder

• Opioid use disorder

• Sedative/hypnotic/anxiolytic use disorder

• Stimulant use disorder

• Tobacco use disorder

Duration

Symptoms occur within 12 months

Symptoms

Physiologic symptoms:

1. Tolerance

2. Withdrawal (does not apply to inhalants and hallucinogens)

Symptoms typical of addiction or : use:

3. Craving to use

4. Using more than intended

5. Difficulty stopping or reducing use

6. Spending significant time devoted to the substance (using, obtaining, recovering)

7. Use despite acknowledging health problems (physical, mental) because of use

Psychosocial sequelae of use

8. Using despite social, occupational or other adverse consequences

9. Neglecting other responsibilities because of use

10. Neglecting other activities because of use

11. Risky or dangerous behaviours or situations because of use

Required number of symptoms

Two or more of the above

Exclusions

ICD-10 : Psychotic state, Non Alcoholic Korsakoff psychosis or syndrome

Symptoms specifiers (extensions to a diagnosis to further classify it)

In a controlled environment : access to the substance is restricted

On maintenance therapy: tobacco or opioids

For hallucinogens or inhalants, specify the specific type

Course specifiers

In early remission: No symptoms for 3-12 months

In sustained remission: No symptoms for >12 months

craving may still be present

Severity specifiers

As a general rule of thumb:

Mild : Presence of two to three symptoms

Moderate : Four to five symptoms

Severe : Six or more symptoms