This infographic shows methadone detection windows on urine, blood, hair and saliva tests. More on methadone detection h ...

How long does it take before methadone wears off? Generally, after a single oral dose effects can last from 6 to 8 hours ...

Methadone is a long acting opioid. Methadone stays in your system and can be detected 2-4 days after last dose. More on ...