cidents, and having unprotected sex. In rare cases, cannabis intoxication may precipitate a
psychosis that may vary in duration. 
Differential Diagnosis
Note that if the clinical presentation includes  hallucinations in the absence of intact reality
testing, a diagnosis of subs tance/medication-induced psyc hotic disorder should be con-
sidered.
Other substance intoxication. Cannabis intoxicati on may resemble intoxication with
other types of substances. However, in contrast to cannabis intoxication, alcohol intoxica-
tion and sedative, hypnotic, or anxiolytic in toxication frequently decrease appetite, in-
crease aggressive behavior, and produce nyst agmus or ataxia. Hallucinogens in low doses
may cause a clinical picture that resembles cannabis intoxication. Phencyclidine, like can-
nabis, can be smoked and also causes perceptual changes, but phencyclidine intoxication
is much more likely to cause ataxia and aggressive behavior. 
Other cannabis-induced disorders. Cannabis intoxication is distinguished from the other
cannabis-induced disorders (e.g., cannabis-in duced anxiety disorder, with onset during
intoxication) because the symptoms in these latter disorders predomin ate the clinical pre-
sentation and are severe enough to wa rrant independent clinical attention. 
Cannabis Withdrawal
Diagnostic Criteria 292.0 (F12.288)
A. Cessation of cannabis use that has been heavy and prolonged (i.e., usually daily or
almost daily use over a period of at least a few months).
B. Three (or more) of the following signs and symptoms develop within approximately 1 week
after Criterion A: