A member asked:

How long does theophylline (xanthine) take to leave the system? does it show up in drug tests?

A doctor has provided 1 answer
Dr. Clarence Lyons answered

Specializes in Family Medicine

Urine drug screen: If you are talking about a urine drug screen. This is not tested as a drug of abuse.

Answered 12/3/2013

4.7k views

Thank

Related Questions