A member asked:

Can a lab urine drug test differentiate the use of tylenol (acetaminophen) #3 w/ codeine & heroin 3 days later? my drug class said i used heroin when i took tylenol (acetaminophen) 3

A doctor has provided 1 answer
Dr. John Gaffney answered

Specializes in Psychiatry

One of the metabolites of codeine is morphine - but not heroin. Be aware though, if it was a low yield test (ie, like the kind you buy at the grocery store) - these usually give you a positive result for any opiate. Anything more specialized (ie, laboratory study ordered by a doctor) - would use mass spectrometry and differentiate every substance independently. Hope that helps!

Answered Mar 2, 2015



Still have questions?

Get the best care from a doctor who knows you.

Book a Video Appointment
Sponsor Content

Related Questions

Online Primary Care Doctors Accepting New Patients

$44 video appointments available today with a membership as low as $15/month

Book a Video Appointment
Ask your question
Didn't find what you're looking for?

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.

Ask your question

Meet your new favorite doctor