U.S. doctors online nowAsk doctors free
Nashville, TN
A 35-year-old male asked:

I dont ever smoke marijuana. but i took one hit from a joint 2 weeks ago. i have to take a hair follicle drug test in 4 days. will i pass it ?

1 doctor answer2 doctors weighed in
Dr. Lynne Weixel
Clinical Psychology 38 years experience
Hard to say: Hair testing is very powerful (1pg/mg) and reflects drug use over the past 90 days (depending on the length of hair available). A shaved head or razor cut might remove evidence of activity from 2 weeks ago. One hit may be too little to worry about, but I can't say I know. If it's very important - you might want to tell them the truth. This sounds like an unintended outcome if you're being honest.
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Apr 19, 2018


Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.