I have a drug screening soon

Hi everyone so I just got a job offer which I’m planning to accept and I need to take a drug screening. I wanted to know what I could do to flush thc out of my system to pass the screening. I have a medical card and I’m planning on not smoking but is there anything I can do to make it faster? My start date is supposed to be March 10th or the 17th. Any help is welcome. I plan on going and talking to the place I am taking my screening and telling them I have a medical card before hand but any other help is welcome! Thank you all and hope you all have a great day!