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for moderate to severe pain; preop sedation; 
Synthetic partial opiate agonist/antagonist; 
Dosage:30mg IM or IV; 50-100mg PO q3-4hr prn; 
Note that 30-60mg IM equianalgesic to 10mg morphine IM; therefore, use with caution in patients receiving opiate drugs; associated with considerable dysphoria;
    KEY SEDATION PAIN OPIOID