U.S. doctors online nowAsk doctors free
Chino Hills, CA
A 27-year-old male asked:

Can a urine lab test tell whether i used codeine or heroin 3 days after last use? my drug class said that they can not tell but would like 2nd opinion

1 doctor answer1 doctor weighed in
Dr. Ed Friedlander
Pathology 45 years experience
Can distinguish: A state-of-the-art toxicologist can tell if it's required.
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Mar 3, 2015

Disclaimer:

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.