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Table 3 Urine positivity rates (%) of different illicit drugs

From: Psychosocial and treatment correlates of opiate free success in a clinical review of a naltrexone implant program

Drug Implant Tablet Historic
Amphetamine 31 14 12
Morphine 4 5 16
THC 50 39 34
Cocaine 1 0 0
Methadone 1 1 7