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150753 Pharmacology

True statement regarding methadone are all EXCEPT

AIt is a long acting u-receptor agonist
BIt is rapidly absorbed from the gastrointestinal tract and is detected in plasma 30 minutes after oral administration
CThe primary use of methadone is relief of chronic pain
DThe onset of analgesia is 30-60 minutes after parenteral administration and 1-2 hours after oral administration
Pharmacology
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