Medication/ Medication Class
Observed Frequency
Amphetamine
1.4%
Benzodiazepines
23.0%
Buprenorphine
1.0%
Carisoprodol
4.6%
Fentanyl
1.5%
Meperidine
0.4%
Methadone
2.2%
Opiates
19.2%
Propoxyphene
2.7%
Tapentadol
0.2%
Tramadol
4.1%
Table 8:
Prevalence non-reported medications observed in 290,627 specimens.
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