The cannabis plant and its products consist of an enormous variety of chemicals some of the 483 compounds identified are unique to cannabis for example the more than 60 cannabinoids whereas the terpenes with about 140 members forming the most abundant class are widespread in the plant kingdom. Pharmacology the pharmacology of cannabis is complicated by the presence of a wide range of cannabinoids at small doses cannabis produces euphoria relief of anxiety sedation and drowsiness in some respects the effects are similar to those caused by alcohol anandamide has been identified as the endogenous ligand for the cannabinoid receptor and has pharmacological properties similar to those of thc when cannabis is smoked thc can be detected in plasma within seconds of inhalation . Cannabinoids derived from herbal cannabis interact with endogenous cannabinoid systems in the body actions on specific brain receptors cause dose related impairments of psychomotor performance with implications for car and train driving aeroplane piloting and academic performance. Covid 19 updates on library services and operations uoft libraries is getting a new library services platform in january 2021 learn more about the change