Table 4.

Concentrations of morphine and codeine in blood samples from motorists apprehended for DUID in Sweden when both opiates were above the LOQs (5 ng/g) by GC-MS.

Opiate in bloodNumberMedian (2.5 and 97.5 percentiles)
Morphine50650 ng/g (6 and 268)
Codeine50610 ng/g (5 and 451)
Morphine/Codeine ratio >1430Morphine, 70 ng/g; codeine, 10 ng/g
Morphine/Codeine ratio <176Morphine, 10 ng/g; codeine, 180 ng/g