Morphine and codeine are naturally occurring alkaloids in
opioid plants, have long been used as a drug, and are also
abused.Whilethepresenceofillicit drugsortheirmetabolites
inurine is anevidence of intake, their concentrations inblood
are expected to correlate with their effects on the central
nervous system[1].Morphine is a powerful narcotic analgesic
and highly addictive. Codeine is a potent