Every candidate, whether applying for hourly warehouse roles or corporate staff positions,. I live in california and have extensive retail and grocery experience. I was curious if costco does a pre employment marijuana test. A lot of companies out. Webthat means your employer has no business knowing what meds you are on. If you are taking vyvanse, then it will show positive for amphetamine (not methamphetamine) and. Webthe ontario college of pharmacists began its probe after a sales rep for generic drugmaker ranbaxy filed a complaint accusing costco of squeezing out nearly. Webremember, there's no penalty for failing a job application drug test. So, do not smoke for as long as possible prior to the test, drink absurd amounts of water, and take a. Weblet‘s next explore what exactly this testing entails and how costco conducts drug test collection, lab analysis and results review. Costco‘s primary testing method:.