A member asked:

How long does methadone last in your system?

A doctor has provided 1 answer
Dr. Tariq Halim answered

Specializes in Psychiatry

Methadone: It depends on a number of factors: body weight, metabolism, amount used, etc. It is metabolized slowly and can "sit" in fats. The average time it takes to get "out of the system" is ~4-7 days. But it can still be detected in the urine or blood for up to 6 weeks after the last dose.

Answered 9/4/2016

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What causes methadone levels to rise in your system?

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