Methadone is often used to treat opioid addiction because methadone

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Methadone is actually a synthetic opioid used to reduce withdrawal symptoms in those addicted to heroin or other narcotics without producing the high associated with the drug addiction. It is not a strong opioid antagonist (it is an agonist), it does not have more severe withdrawal symptoms than other opioids (it has a longer half-life which allows for a more gradual withdrawal), it is an opioid (not "not an opioid"), and it does cross the blood-brain barrier.

Methadone Is Often Used to Treat Opioid Addiction Because Methadone