I'm not a toxicologist and never played one on TV, but I found this:
Abuse
The psychological effects of THC include an increased sense of well being or euphoria, relaxation, slowed psycho-motor response, an altered sense of time, short term memory impairment and impairment of multi-tasking performance.
THC Retention Time
Infrequent (less than twice/week) Smoking: When screening assays of 50 ng/mL or greater are used, urine samples will generally be positive for 1-3 days.
Regular (several times per week) Smoking: May result in urine specimens testing positive for 7-21 days.
Chronic (daily) Smoking: An individual who smokes marijuana daily for prolonged periods of time can test positive for 30 days or longer.
https://www.redwoodtoxicology.com/resources/drug_info/marijuana
I don’t think all that applies now that pot is medicine. /sarc
That list doesn’t include paranoia associated with pot