How long does Methadone stay in your system?

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If taken 20mg of methadone, how long will that be out of my system?

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2 Responses to “How long does Methadone stay in your system?”

  1. yarbigy Says:

    methadone has a halflife of ~24 hours.

    24 horus after dosing, your’ll have 10mg.
    24 hours after that, 5 mg
    24 after that 2.5
    24 after that 1.25mg
    and so until its negligible/gone.

    if your asking how long will you “feel” the methadone, usually one or two halflifes and no you longer feel it.

    how is it testable for? that can be weeks…

  2. thebigguy_25420 Says:

    Potentially up to 2 weeks:

    The detection window of any drug depends upon age, weight, mind set, and health condition of the examinee. Apart from that, the dosage of the drug, its quality, and period and potency play an important role during the drug test. Urine test reveals positive result for 1-7 days. The half-life of drug is just 24-36 hours, and it may remain in your system from 7 hours to 52 hours. Half-life refers to the time taken to eliminate half of the drug’s effect; A drug takes 4-5 half lives to get expelled out of your system completely. It is always better for the person to stop using methadone two weeks prior to suboxone treatment.

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