THC:
Delta-9-tetrahydrocannabinol (Delta-9-THC) (main psychoactive component) is responsible for many of the effects of recreational marijuana use. Behavioural and psychological effects include euphoria, sedation/relaxation, and disinhibition.
CBD:
Cannabidiol (CBD) (non-psychoactive) is responsible for many of the medicinal properties of marijuana. Behavioural and psychological effects include anxiety reduction and deep relaxation.
Reference: https://www.nrspp.org.au/resources/nrspp-quick-fact-medicinal-marijuana-driving/