Coca tea consumption causes positive urine cocaine assay

  title={Coca tea consumption causes positive urine cocaine assay},
  author={Suzan S. Mazor and Mark B Mycyk and Brandon K. Wills and Larry D. Brace and Leon Gussow and Timothy Erickson},
  journal={European Journal of Emergency Medicine},
Background Coca tea, derived from the same plant that is used to synthesize cocaine, is commonly consumed in South America and easily obtained in the United States. Objectives To determine whether consumption of coca tea would result in a positive urine toxicology screen for cocaine metabolites. Methods Five healthy adult volunteers consumed coca tea and underwent serial quantitative urine testing for cocaine metabolites by fluorescence polarization immunoassay. The cutoff for a positive assay… Expand
Analysis of Cocaine and its Metabolites in Urine After Consummation of Coca Tea by Five Subjects and Subsequent Hair Testing.
This study supports the athlete's claims and supports her claims that she had consumed a coca tea in the morning before the competition and all the hair tests were negative for cocaine using a limit of decision at 10 pg/mg. Expand
Does Lidocaine Cause False Positive Results on Cocaine Urine Drug Screen?
There is no evidence that lidocaine or norlidocaine are capable of producing false positive results on standard cocaine urine immunoassays. Expand
The Effects of Herbs, Spices and Foodstuffs on Urine Screens for Drug Abuse by Immunoassay
Drug abusers are highly motivated to obtain negative results on urine drug abuse screens and may attempt to subvert the process by trying to adulterate their samples. One of the processes thought toExpand
Miscellaneous Issues
  • A. Dasgupta
  • Medicine
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  • 2019
These issues are discussed in this chapter which show that handling paper money contaminated with drugs does not cause false positive test results because illicit drugs are not absorbed through skin, but some herbal tea such as Mate de Coca which are legally sold in some South American countries contain small amount of cocaine and drinking such tea may cause positive cocaine test result. Expand
Defending Positive Cocaine Tests
People try to defend positive cocaine test results by claiming they drink herbal tea or visit a dentist who uses procaine as an anesthetic, but Procaine does not contain cocaine and use of procaine cannot result in positive test results. Expand
Limitations of Drugs of Abuse Testing
In most toxicology laboratories, approximately 10 commonly abused drugs are tested in urine specimens, although the Substance Abuse and Mental Health Services Administration recommends that only 5Expand
Issues of Interferences With Immunoassays Used for Screening of Drugs of Abuse in Urine
The cause of false-positive test result in urine drug screen using immunoassays is discussed in detail and ephedrine/pseudoephedrine which are used in many over-the-counter cold medications are commonly encountered in false- positive amphetamine test results. Expand
Urine Drug Screening : Practical Guide for Clinicians REVIEW
Potential false-positive results and false-negative results that occur with immunoassays of amphetamines, cannabinoids, cocaine, opiates, and phencyclidine and with alcohol, benzodiazepines, and tricyclic antidepressants are discussed. Expand
Urine drug screening: practical guide for clinicians.
Pagmatic concepts summarized in this article should minimize the potential risks of misinterpreting urine drug screens and the potential pitfalls, such as adulteration, substitution, and dilution of urine samples, which can lead to serious medical or social consequences. Expand
Toxicological Analysis for Cocaine Use
Testing for cocaine has been required in a great variety of situations: emergency rooms, workplace settings, obstetrics and pediatrics, traffic settings, postmortem investigations, and epidemiology. Expand


Identification and quantitation of alkaloids in coca tea.
It is demonstrated that coca tea bags and coca Tea contain a significant amount of cocaine and cocaine-related alkaloids and the consumption of a single cup of Peruvian or Bolivian cocaTea produces positive drug test results for cocaine metabolites. Expand
Determination of cocaine in "Mate de Coca" herbal tea.
The selling of this product is illegal under the provisions of the Control Measures of the 1961 Single Convention of the United Nations because it contains cocaine and carries a potential for abuse. Expand
Quinolones and false-positive urine screening for opiates by immunoassay technology.
Greater attention to the cross-reactivity of quinolones with immunoassays for opiates is needed to minimize the potential for invalid test interpretation. Expand
Pharmacokinetic characteristics of N7-substituted theophylline derivatives and their interaction with quinolone in rats.
It is indicated that in rats, DPP is mainly excreted by active tubular secretion and that renal tubular reabsorption contributes to renal excretion of PXP with glomerular filtration. Expand
False-positive urine drug screen: beware the poppy seed bagel.
Mate de coca equals cocaine.
  • A. Florén, J. Small
  • Medicine
  • Journal of occupational medicine. : official publication of the Industrial Medical Association
  • 1993
Coca tea and urinalysis for cocaine metabolites.