From: Dose patterns in commercially insured subjects chronically exposed to opioids: a large cohort study in the United States
Opioid medication
Percentage
Fentanyl
0.2
Hydrocodone
78.8
Hydromorphone
Meperidine
1.7
Methadone
0.004
Morphine
Oxycodone
18.7
Oxymorphone
0.002