CAN A DRUG TEST TELL THE DIFFERENCE BETWEEN HEROIN AND METHADONE?

Question by Jon R:
can a drug test tell the difference between heroin and methadone?
my son is on a methadone program but i assume he might be utilizing heroin again i want to drug test him.

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Answer by Jenny
yea your pee requires out all the stuff that your body doesnt require so it will take out the certain variety of drug that your son could be employing