New Job

Throw away account

Hey everyone, so I was accepted for a position at a privately owned pharmacy and I didn't really know anything about the field beforehand. I'm in a place where marijuana products are legal and I'm a regular user. I just found out that They have to abide by federal regulations because they receive money from Medicare and Medicaid.

Should I tell them that I use marijuana recreationally or should I keep it to myself? I have to go through a drug screening so they're going to find out either way. Should I just let them find out through the test or should I just be upfront about it and withdraw my application?

I was already accepted after going through the interview process and the topic of marijuana never came up. My first day is next week and I've already told family members about it.

Am I screwed?