This is Dr. David
hydrocodone can metabolize into hydromorphone in the body
hydromorphone may be excreted in urine at concentrations up to 2.5% of the morphine concentration
so there can be a tiny amount of morphine in the urine with hydrocodone use.
urinalysis is different from a urine tox screen test which looks for morphine or MOP
is a good article
hydrocodone and morphine can be detected for up to 3 days after use in the urine.
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