A definite diagnosis of dependence should usually be made only if three or more of the following have been experienced or exhibited at some time during the previous year:

(a) a strong desire or sense of compulsion to take cannabinoid;

(b) difficulties in controlling cannabinoid-taking behaviour in terms of its onset, termination, or levels of use;

(c) a physiological withdrawal state when cannabinoid use has ceased or been reduced, as evidenced by: the characteristic withdrawal syndrome for cannabinoid; or use of the same (or a closely related) substance with the intention of relieving or avoiding withdrawal symptoms;

(d) evidence of tolerance, such that increased doses of cannabinoid are required in order to achieve effects originally produced by lower doses;

(e) progressive neglect of alternative pleasures or interests because of cannabinoid use, increased amount of time necessary to obtain or take the substance or to recover from its effects;

(f) persisting with cannabinoid use despite clear evidence of overtly harmful consequences, such as depressive mood states consequent to periods of heavy substance use, or drug-related impairment of cognitive functioning; efforts should be made to determine that the user was actually, or could be expected to be, aware of the nature and extent of the harm.

Narrowing of the personal repertoire of patterns of cannabinoid use has also been described as a characteristic feature.

It is an essential characteristic of the dependence syndrome that either cannabinoid taking or a desire to take cannabinoid should be present; the subjective awareness of compulsion to use drugs is most commonly seen during attempts to stop or control substance use.