Urine drug test for marijuana This topic has 0 replies, 1 voice, and was last updated 2 years, 5 months ago by imsomebuddy. Viewing 0 reply threads Author Posts July 11, 2022 at 10:31 pm #7565 imsomebuddyParticipant Hi there. 1. My son has smoked marijuana for two and half months every day. How long after cessation his urine test will show negative? 2. Can just a very very short drag of Marijuana be shown on urine drug test? If so how long after it? 3. Who you call a chronic Marijuana smoker? A two or three months abuse can be considered chronic? Thanks a lot. Author Posts Viewing 0 reply threads You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In