Cannabinoid Screening in Urine (Mass Concentration)

Your doctor may order this test to help find the cause of symptoms you are experiencing, to screen for a condition before it causes problems, or to monitor a health issue you already know you have. The results can also show whether a current treatment is working as expected.

Your healthcare provider may recommend this test if you’ve been suspected of using marijuana, if you’re required to submit to drug testing for employment, legal reasons, or to monitor substance use in a treatment program. It can also be part of routine screening for certain conditions or before certain procedures.

Before the test, your healthcare team will give you clear instructions to follow. Depending on the type of test, you may need to fast for a certain number of hours, pause certain medicines, or drink plenty of water. Tell your provider about all medications, supplements, and allergies you have before the day of the test.

No special preparation is needed. You’ll provide a urine sample in a private area. Avoid drinking alcohol or consuming certain medications that might affect results for 24 hours before testing.

Test results are usually reported as normal or abnormal based on a reference range. A normal result suggests no signs of the condition being tested for, while an abnormal result may point to a health issue that needs a closer look. Your doctor will consider your symptoms, medical history, and other findings together with these results before explaining what they mean for you.

Positive results indicate recent marijuana use, typically within the past 2–3 weeks. Negative results mean no detectable cannabinoids were found in your urine at the time of testing. Consult your provider for interpretation based on your situation.

This test is often used to check for infections, evaluate symptoms such as pain, fever, or unusual fatigue, confirm or rule out a suspected diagnosis, screen people with a family history of certain diseases, and keep track of chronic conditions or how well long-term treatments are working over time.

This test is commonly used in workplace drug screens, legal investigations, or to assess substance use in medical or behavioral health settings. It’s not designed to detect long-term storage of cannabinoids in the body.