false-positive and false-negative rates due to cross-reactivity and tially morphine antibodies, and are not able to detect semisynthetic opioids or
get a false positive for codeine or morphine on a urine drug test. What should you do if you get a false positive on a drug test? If
Possible causes of false positive and false negative results in urine drug testing Diphenhydramine. Quinine. Rifampin. Morphine. Codeine.
Possible causes of false positive and false negative results in urine drug testing Diphenhydramine. Quinine. Rifampin. Morphine. Codeine.
effects of morphine morphine/codeine (opiates). ◦ Heroin metabolizes into codeine, codeine metabolizes into morphine. ◦ Relatively high false positive rate.
Two laboratories reported false positives (morphine and/or metabolites and oxazepam). Also, laboratories reporting false positive or false negative results
Possible causes of false positive and false negative results in urine drug testing Diphenhydramine. Quinine. Rifampin. Morphine. Codeine.
High-doses morphine(morphine urine levels turning positive within the 15,000 to 28,000 mg/mL range) can cause a false-positive buprenorphine.
Morphine is the target analyte for codeine/morphine testing. An understanding of these limitations is necessary to identify false-positive and false-negative
Regards, Jack