Very much so. An ex-coworker worked for a cardboard factory, attempted to unionize the workforce by providing lunches to workers during talk shops. He was taking liquid cannabis, had a doctors permission, script to get his medical card, only dosed enough for his aliment, and HR was aware.
Management had him take a urine analysis, supposedly workforce wide, of course failed due to the cannabis use, fired him the same day.
Never missed a day he scheduled, good guy.
Working for the city we do routine tests, especially CDL drivers, but from what I understand, they don't look for positive tests for cannabis, so I'm unsure if we're seeing a shift due to the legalization across nearly half the US, or they're specifically looking for opioids.
Just figured I'd share a perspective.