Benzoylecgonine

Benzoylecgonine at a Glance

Benzoylecgonine (BZE) is a tropane alkaloid with a double identity. It occurs naturally as a minor alkaloid of coca leaf (Erythroxylum coca), but it matters far more as the principal metabolite of cocaine — the compound the body makes when it strips the methyl ester off cocaine ^{1Reference 1Roque Bravo R et al. · 2022Cocaine: an updated overview on chemistry, detection, biokinetics, and pharmacotoxicological aspects including abuse patternView study →}. Structurally it is the benzoyl ester of ecgonine: cocaine minus one methyl group.

Its significance is forensic and analytical, not pharmacological. Because benzoylecgonine is abundant, chemically stable and longer-lived than cocaine itself, it is the molecule that standard cocaine urine drug screens actually detect, and the chemical marker used to estimate community cocaine use from sewage ^{2,8Reference 2Moeller KE et al. · 2017Clinical interpretation of urine drug tests: what clinicians need to know about urine drug screensView study →Reference 8Zuccato E et al. · 2008Estimating community drug abuse by wastewater analysisView study →}. The consequence people meet in practice: drinking coca tea puts benzoylecgonine into the urine and can produce a positive cocaine-metabolite test ^{5,6Reference 5Jenkins AJ et al. · 1996Identification and quantitation of alkaloids in coca teaView study →Reference 6Mazor SS et al. · 2006Coca tea consumption causes positive urine cocaine assayView study →}.

Pharmacologically the molecule is largely inert. Unlike cocaine, it has little or no action at the monoamine transporters and is not a stimulant or reinforcer ^{1Reference 1Roque Bravo R et al. · 2022Cocaine: an updated overview on chemistry, detection, biokinetics, and pharmacotoxicological aspects including abuse patternView study →}. The one pharmacodynamic signal in the literature is a proposed cerebral-vasoconstrictor role seen in animal arteries, of interest mainly to the study of cocaine-associated stroke ^{9,10Reference 9Madden JA · 1990In vitroEffect of cocaine and cocaine metabolites on cerebral arteries in vitroView study →Reference 10Madden JA et al. · 1995Cocaine and benzoylecgonine constrict cerebral arteries by different mechanismsView study →}.

The Cocaine Drug-Test & Wastewater Marker

This is the point of the molecule. When a laboratory reports a “positive for cocaine,” it is almost never measuring cocaine — it is measuring benzoylecgonine.

Why BZE is the target analyte. Cocaine is cleared from the body within hours, but benzoylecgonine is more abundant, more stable and persists far longer, so it gives a wider detection window ^{1,3Reference 1Roque Bravo R et al. · 2022Cocaine: an updated overview on chemistry, detection, biokinetics, and pharmacotoxicological aspects including abuse patternView study →Reference 3Jufer RA et al. · 2000Clinical trialElimination of cocaine and metabolites in plasma, saliva, and urine following repeated oral administration to human volunteersView study →}. Immunoassay cocaine screens are raised against benzoylecgonine, and confirmatory GC-MS / LC-MS assays quantify it specifically ^{2Reference 2Moeller KE et al. · 2017Clinical interpretation of urine drug tests: what clinicians need to know about urine drug screensView study →}. Under the standard federal (SAMHSA) workplace thresholds, a urine sample screens positive at 300 ng/mL and is confirmed at 150 ng/mL of benzoylecgonine ^{2Reference 2Moeller KE et al. · 2017Clinical interpretation of urine drug tests: what clinicians need to know about urine drug screensView study →}. A typical detection window after use is a few days, extending with heavy or repeated exposure ^{3,4Reference 3Jufer RA et al. · 2000Clinical trialElimination of cocaine and metabolites in plasma, saliva, and urine following repeated oral administration to human volunteersView study →Reference 4Jufer R et al. · 2006Effect of repeated cocaine administration on detection times in oral fluid and urineView study →}.

The coca-tea problem. Because benzoylecgonine is both a coca-leaf alkaloid and the metabolite of the coca-leaf alkaloid cocaine, ingesting coca leaf or coca tea produces the same urinary marker as illicit cocaine use. In a controlled study, a single cup of coca tea drove peak urinary benzoylecgonine to roughly 3,940–4,979 ng/mL ^{5Reference 5Jenkins AJ et al. · 1996Identification and quantitation of alkaloids in coca teaView study →}; in another, every participant screened positive (>300 ng/mL) within 2 hours, and some remained positive at 36 hours ^{6Reference 6Mazor SS et al. · 2006Coca tea consumption causes positive urine cocaine assayView study →}. A positive test therefore cannot, on its own, distinguish a cup of Andean tea from cocaine use — a recurring issue in workplace and clinical toxicology ^{6Reference 6Mazor SS et al. · 2006Coca tea consumption causes positive urine cocaine assayView study →}.

The wastewater marker. The same properties make benzoylecgonine the backbone of wastewater-based epidemiology. Because it is excreted in proportion to cocaine consumed and survives in sewage, measuring benzoylecgonine at treatment plants lets researchers back-calculate community cocaine use for a whole catchment in near-real time — the method Zuccato and colleagues introduced with cocaine/benzoylecgonine in surface waters and formalised as a population drug-monitoring tool ^{7,8Reference 7Zuccato E et al. · 2005Cocaine in surface waters: a new evidence-based tool to monitor community drug abuseView study →Reference 8Zuccato E et al. · 2008Estimating community drug abuse by wastewater analysisView study →}.

How Benzoylecgonine Forms

Benzoylecgonine is a hydrolysis product of cocaine. Cocaine has two ester groups; benzoylecgonine results from losing the methyl ester (the –COOCH₃), leaving the benzoyl ester and the carboxylic acid intact ^{1Reference 1Roque Bravo R et al. · 2022Cocaine: an updated overview on chemistry, detection, biokinetics, and pharmacotoxicological aspects including abuse patternView study →}.

Two routes converge on it. Much of the conversion is non-enzymatic: cocaine spontaneously hydrolyses to benzoylecgonine in a pH-dependent way in aqueous body fluids. The rest is enzymatic, chiefly through hepatic carboxylesterase-1 (hCE1) ^{1Reference 1Roque Bravo R et al. · 2022Cocaine: an updated overview on chemistry, detection, biokinetics, and pharmacotoxicological aspects including abuse patternView study →}. This is a different pathway from the one that makes the co-metabolite ecgonine methyl ester, which is cut at the other ester by plasma butyrylcholinesterase and carboxylesterase-2 ^{1Reference 1Roque Bravo R et al. · 2022Cocaine: an updated overview on chemistry, detection, biokinetics, and pharmacotoxicological aspects including abuse patternView study →}. Benzoylecgonine is the dominant of the two urinary metabolites, which is exactly why it — not ecgonine methyl ester — became the standard drug-test analyte ^{1,3Reference 1Roque Bravo R et al. · 2022Cocaine: an updated overview on chemistry, detection, biokinetics, and pharmacotoxicological aspects including abuse patternView study →Reference 3Jufer RA et al. · 2000Clinical trialElimination of cocaine and metabolites in plasma, saliva, and urine following repeated oral administration to human volunteersView study →}.

Its longevity is the other half of the story: cocaine’s plasma half-life is on the order of an hour, whereas benzoylecgonine’s is several times longer, so it accumulates relative to the parent and lingers to be detected ^{1,3Reference 1Roque Bravo R et al. · 2022Cocaine: an updated overview on chemistry, detection, biokinetics, and pharmacotoxicological aspects including abuse patternView study →Reference 3Jufer RA et al. · 2000Clinical trialElimination of cocaine and metabolites in plasma, saliva, and urine following repeated oral administration to human volunteersView study →}.

What It's Used For

Benzoylecgonine is unusual for a compound page: its evidence base is almost entirely analytical and toxicological, not therapeutic. The molecule is not developed or used as a medicine, and its intrinsic pharmacology is thin.

The genuine, established role is analytical.Benzoylecgonine is the target analyte of routine cocaine urine drug testing (federal cutoffs 300 ng/mL screen / 150 ng/mL confirmation) and the marker of wastewater-based cocaine epidemiology — both mature, real-world applications ^{2,7,8Reference 2Moeller KE et al. · 2017Clinical interpretation of urine drug tests: what clinicians need to know about urine drug screensView study →Reference 7Zuccato E et al. · 2005Cocaine in surface waters: a new evidence-based tool to monitor community drug abuseView study →Reference 8Zuccato E et al. · 2008Estimating community drug abuse by wastewater analysisView study →}.

It is largely inactive where cocaine is active.Unlike its parent it shows little or no monoamine-transporter reuptake inhibition and no local-anaesthetic sodium-channel block — it is not a stimulant or reinforcer ^{1Reference 1Roque Bravo R et al. · 2022Cocaine: an updated overview on chemistry, detection, biokinetics, and pharmacotoxicological aspects including abuse patternView study →}.

The one pharmacodynamic signal is cerebrovascular and preclinical.In isolated animal arteries benzoylecgonine constricts cerebral vessels — by a mechanism distinct from cocaine’s — which is studied as a possible contributor to cocaine-associated stroke, not a therapeutic effect ^{9,10,11,12Reference 9Madden JA · 1990In vitroEffect of cocaine and cocaine metabolites on cerebral arteries in vitroView study →Reference 10Madden JA et al. · 1995Cocaine and benzoylecgonine constrict cerebral arteries by different mechanismsView study →Reference 11Schreiber MD et al. · 1994Effects of cocaine, benzoylecgonine, and cocaine metabolites in cannulated pressurized fetal sheep cerebral arteriesView study →Reference 12Kurth CD et al. · 1993Cocaine and its metabolites constrict cerebral arterioles in newborn pigsView study →}.

Evidence by IndicationStrength of support · Beta

Support is an experimental score — weighted by study type (human > animal > in vitro) and volume. A beta, not a validated metric. These “applications” are analytical/forensic roles and a preclinical pharmacology signal, not therapeutic uses, so read each row’s basis.

Mechanisms

Target / pathway	Effect	Relevant to
Immunoassay antibody + GC-MS / LC-MS assays	abundant, stable, long-lived urinary analyte — the measured “cocaine” target	forensic drug testing
Sewage excretion + catchment back-calculation	proportional marker of community cocaine consumption	wastewater epidemiology
Monoamine transporters (DAT / NET / SERT)	little to no reuptake inhibition — not a stimulant/reinforcer like cocaine	why it is pharmacologically inert
Voltage-gated Na⁺ channels	lacks cocaine’s local-anaesthetic sodium-channel block	why it is pharmacologically inert
Cerebral artery smooth muscle	vasoconstriction by a mechanism distinct from cocaine’s	cerebrovascular (proposed)
Non-enzymatic (pH-dependent) hydrolysis + carboxylesterase-1	cleaves cocaine’s methyl ester → forms benzoylecgonine	metabolism / formation

The load-bearing contrast is inactivity: benzoylecgonine keeps cocaine’s benzoyl ester but has essentially lost the transporter and sodium-channel pharmacology, which is exactly why it is a clean marker of exposure rather than a psychoactive drug in its own right ^{1Reference 1Roque Bravo R et al. · 2022Cocaine: an updated overview on chemistry, detection, biokinetics, and pharmacotoxicological aspects including abuse patternView study →}.

Pharmacokinetics

Benzoylecgonine is a downstream metabolite, so its pharmacokinetics are really cocaine’s disposition. Cocaine is cleared with a plasma half-life of roughly an hour; benzoylecgonine forms from it by non-enzymatic and carboxylesterase-1 hydrolysis and has a substantially longer half-life (several hours), so it accumulates relative to the parent and persists for detection ^{1,3Reference 1Roque Bravo R et al. · 2022Cocaine: an updated overview on chemistry, detection, biokinetics, and pharmacotoxicological aspects including abuse patternView study →Reference 3Jufer RA et al. · 2000Clinical trialElimination of cocaine and metabolites in plasma, saliva, and urine following repeated oral administration to human volunteersView study →}. It is hydrophilic and renally excreted, appearing in urine at high concentration; typical urinary detection runs to a few days after use, lengthening with heavy or repeated exposure ^{3,4Reference 3Jufer RA et al. · 2000Clinical trialElimination of cocaine and metabolites in plasma, saliva, and urine following repeated oral administration to human volunteersView study →Reference 4Jufer R et al. · 2006Effect of repeated cocaine administration on detection times in oral fluid and urineView study →}. Controlled oral-cocaine dosing confirms the pattern — benzoylecgonine is the dominant urinary species and the last to fall below cutoff ^{3,4Reference 3Jufer RA et al. · 2000Clinical trialElimination of cocaine and metabolites in plasma, saliva, and urine following repeated oral administration to human volunteersView study →Reference 4Jufer R et al. · 2006Effect of repeated cocaine administration on detection times in oral fluid and urineView study →}. Because it is a metabolite rather than an administered drug, “oral bioavailability” is not a meaningful figure for it; the relevant number is its long urinary persistence, which is the whole basis of its analytical value.

Clinical Trials

There are no therapeutic clinical trials of benzoylecgonine — it is not a drug candidate. Human research uses it as a biomarker (controlled cocaine and coca-tea dosing to characterise detection windows ^{3,5,6Reference 3Jufer RA et al. · 2000Clinical trialElimination of cocaine and metabolites in plasma, saliva, and urine following repeated oral administration to human volunteersView study →Reference 5Jenkins AJ et al. · 1996Identification and quantitation of alkaloids in coca teaView study →Reference 6Mazor SS et al. · 2006Coca tea consumption causes positive urine cocaine assayView study →}) and its pharmacology is confined to preclinical isolated-vessel studies ^{9,10,11,12Reference 9Madden JA · 1990In vitroEffect of cocaine and cocaine metabolites on cerebral arteries in vitroView study →Reference 10Madden JA et al. · 1995Cocaine and benzoylecgonine constrict cerebral arteries by different mechanismsView study →Reference 11Schreiber MD et al. · 1994Effects of cocaine, benzoylecgonine, and cocaine metabolites in cannulated pressurized fetal sheep cerebral arteriesView study →Reference 12Kurth CD et al. · 1993Cocaine and its metabolites constrict cerebral arterioles in newborn pigsView study →}.

Completed	Planned	Terminated	Preclinical
None as a therapeutic; human use is biomarker/detection-window studies ^{3,5,6Reference 3Jufer RA et al. · 2000Clinical trialElimination of cocaine and metabolites in plasma, saliva, and urine following repeated oral administration to human volunteersView study →Reference 5Jenkins AJ et al. · 1996Identification and quantitation of alkaloids in coca teaView study →Reference 6Mazor SS et al. · 2006Coca tea consumption causes positive urine cocaine assayView study →}	—	—	Cerebral-artery vasoconstriction in animal models ^{9,10,11,12Reference 9Madden JA · 1990In vitroEffect of cocaine and cocaine metabolites on cerebral arteries in vitroView study →Reference 10Madden JA et al. · 1995Cocaine and benzoylecgonine constrict cerebral arteries by different mechanismsView study →Reference 11Schreiber MD et al. · 1994Effects of cocaine, benzoylecgonine, and cocaine metabolites in cannulated pressurized fetal sheep cerebral arteriesView study →Reference 12Kurth CD et al. · 1993Cocaine and its metabolites constrict cerebral arterioles in newborn pigsView study →}

Last checked: July 2026.

Isolate vs. Plant Studies

The isolate-vs-plant frame lands differently here than for a typical phytochemical. As an analytical target, the isolate is the whole point — benzoylecgonine is measured as a pure, certified reference analyte, and drug-test cutoffs are defined for the isolated molecule ^{2Reference 2Moeller KE et al. · 2017Clinical interpretation of urine drug tests: what clinicians need to know about urine drug screensView study →}. As an exposure, the “plant” route is what makes it interesting: the coca-tea studies that show a positive test used the whole beverage (Erythroxylum coca leaf), where benzoylecgonine is both a trace native alkaloid and the metabolite generated from the leaf’s cocaine ^{5,6Reference 5Jenkins AJ et al. · 1996Identification and quantitation of alkaloids in coca teaView study →Reference 6Mazor SS et al. · 2006Coca tea consumption causes positive urine cocaine assayView study →}. And the sparse pharmacology is pure-isolate, animal-artery work ^{9,10Reference 9Madden JA · 1990In vitroEffect of cocaine and cocaine metabolites on cerebral arteries in vitroView study →Reference 10Madden JA et al. · 1995Cocaine and benzoylecgonine constrict cerebral arteries by different mechanismsView study →} — never the whole plant. So the honest reading is: isolated molecule for the chemistry and the toxicology hypothesis; whole coca leaf/tea for the real-world exposure that produces it.

Prevalence in Nature

In nature benzoylecgonine is a minor tropane alkaloid of coca leaf, dwarfed by cocaine. Exhaustive analysis of coca-tea bags found only about 0.11 mg (Peruvian) to 0.12 mg (Bolivian) of benzoylecgonine per bag, against roughly 5 mg of cocaine — a small fraction of the total alkaloid load ^{5Reference 5Jenkins AJ et al. · 1996Identification and quantitation of alkaloids in coca teaView study →}. It sits alongside the other coca tropanes — cocaine, ecgonine methyl ester, cinnamoylcocaine and ecgonine — in the leaf’s characteristic alkaloid profile ^{5Reference 5Jenkins AJ et al. · 1996Identification and quantitation of alkaloids in coca teaView study →}.

Its far larger “natural” reservoir is not botanical but metabolic and environmental: benzoylecgonine is the most abundant cocaine metabolite in the urine and blood of anyone exposed to cocaine, and consequently a routine constituent of municipal wastewater and surface water in populations where cocaine is used ^{7,8Reference 7Zuccato E et al. · 2005Cocaine in surface waters: a new evidence-based tool to monitor community drug abuseView study →Reference 8Zuccato E et al. · 2008Estimating community drug abuse by wastewater analysisView study →}. In that sense the molecule is most prevalent wherever cocaine is consumed, not wherever coca grows.

Discovery & Synthesis

Benzoylecgonine entered science through forensic toxicology rather than natural-products chemistry: it was characterised as the principal urinary metabolite of cocaine and became the analyte on which cocaine drug testing was built, and it was separately identified as a minor native alkaloid of coca leaf in alkaloid-profiling work ^{1,5Reference 1Roque Bravo R et al. · 2022Cocaine: an updated overview on chemistry, detection, biokinetics, and pharmacotoxicological aspects including abuse patternView study →Reference 5Jenkins AJ et al. · 1996Identification and quantitation of alkaloids in coca teaView study →}. Chemically it is simply cocaine’s demethylated hydrolysis product — the benzoyl ester of ecgonine — so it “arises” wherever cocaine breaks down rather than needing a dedicated synthesis.

Manufacture today is limited to certified analytical reference standards: toxicology and environmental laboratories buy purified benzoylecgonine (and isotopically labelled versions) to calibrate immunoassays and mass-spectrometry methods ^{2Reference 2Moeller KE et al. · 2017Clinical interpretation of urine drug tests: what clinicians need to know about urine drug screensView study →}. It is not produced as a therapeutic, and as a cocaine metabolite it falls under controlled-substance regulation.

Patents: not yet researched.

Toxicity & Safety

Benzoylecgonine carries a low intrinsic-toxicity flag as an isolate: it is largely inactive at the monoamine transporters and sodium channels that make cocaine dangerous, and it is not a stimulant or reinforcer ^{1Reference 1Roque Bravo R et al. · 2022Cocaine: an updated overview on chemistry, detection, biokinetics, and pharmacotoxicological aspects including abuse patternView study →}. Its practical “risks” are mostly analytical and medico-legal rather than pharmacological, with one preclinical cerebrovascular caveat.

Safety at a Glance

Low / no toxicityControlled substance

Pharmacologically largely inert. Little to no monoamine-reuptake or sodium-channel activity — not a stimulant or reinforcer, unlike cocaine ^{1Reference 1Roque Bravo R et al. · 2022Cocaine: an updated overview on chemistry, detection, biokinetics, and pharmacotoxicological aspects including abuse patternView study →}.
It is what a “positive cocaine test” measures. Coca leaf or coca tea produces urinary benzoylecgonine and a positive cocaine-metabolite screen (>300 ng/mL within ~2 h, potentially positive for a day or more) — indistinguishable on the test from illicit use ^{5,6Reference 5Jenkins AJ et al. · 1996Identification and quantitation of alkaloids in coca teaView study →Reference 6Mazor SS et al. · 2006Coca tea consumption causes positive urine cocaine assayView study →}.
Proposed cerebral vasoconstrictor. Isolated-artery studies show benzoylecgonine constricts cerebral vessels and may contribute to cocaine-associated cerebrovascular events — preclinical, not demonstrated in humans ^{9,10,11,12Reference 9Madden JA · 1990In vitroEffect of cocaine and cocaine metabolites on cerebral arteries in vitroView study →Reference 10Madden JA et al. · 1995Cocaine and benzoylecgonine constrict cerebral arteries by different mechanismsView study →Reference 11Schreiber MD et al. · 1994Effects of cocaine, benzoylecgonine, and cocaine metabolites in cannulated pressurized fetal sheep cerebral arteriesView study →Reference 12Kurth CD et al. · 1993Cocaine and its metabolites constrict cerebral arterioles in newborn pigsView study →}.
Controlled-substance context. As the principal metabolite of cocaine it is regulated and handled only as an analytical reference standard, not a consumer material.

Human Exposure & Testing Thresholds

Benzoylecgonine is not administered and has no therapeutic dose. The only meaningful human figures are the analytical thresholds it is measured against and the exposure that coca products produce:

Context	Figure
Immunoassay screening cutoff (urine)	300 ng/mL ^{2Reference 2Moeller KE et al. · 2017Clinical interpretation of urine drug tests: what clinicians need to know about urine drug screensView study →}
GC-MS / LC-MS confirmation cutoff	150 ng/mL ^{2Reference 2Moeller KE et al. · 2017Clinical interpretation of urine drug tests: what clinicians need to know about urine drug screensView study →}
Peak urinary BZE after one cup of coca tea	~3,940–4,979 ng/mL ^{5Reference 5Jenkins AJ et al. · 1996Identification and quantitation of alkaloids in coca teaView study →}
Coca-tea study, mean urinary BZE	1,777 ng/mL; positive (>300 ng/mL) by 2 h, some to 36 h ^{6Reference 6Mazor SS et al. · 2006Coca tea consumption causes positive urine cocaine assayView study →}

These are analytical cutoffs and measured exposure figures, not a personal recommendation or a dose of anything.

References

Roque Bravo R, et al. (2022). Cocaine: an updated overview on chemistry, detection, biokinetics, and pharmacotoxicological aspects including abuse pattern. Toxins (Basel). https://pubmed.ncbi.nlm.nih.gov/35448887/
Moeller KE, et al. (2017). Clinical interpretation of urine drug tests: what clinicians need to know about urine drug screens. Mayo Clinic Proceedings. https://pubmed.ncbi.nlm.nih.gov/28325505/
Jufer RA, et al. (2000). Elimination of cocaine and metabolites in plasma, saliva, and urine following repeated oral administration to human volunteers. Journal of Analytical Toxicology. https://pubmed.ncbi.nlm.nih.gov/11043648/
Jufer R, et al. (2006). Effect of repeated cocaine administration on detection times in oral fluid and urine. Journal of Analytical Toxicology. https://pubmed.ncbi.nlm.nih.gov/16959139/
Jenkins AJ, et al. (1996). Identification and quantitation of alkaloids in coca tea. Forensic Science International. https://pubmed.ncbi.nlm.nih.gov/8819993/
Mazor SS, et al. (2006). Coca tea consumption causes positive urine cocaine assay. European Journal of Emergency Medicine. https://pubmed.ncbi.nlm.nih.gov/17091055/
Zuccato E, et al. (2005). Cocaine in surface waters: a new evidence-based tool to monitor community drug abuse. Environmental Health. https://pubmed.ncbi.nlm.nih.gov/16083497/
Zuccato E, et al. (2008). Estimating community drug abuse by wastewater analysis. Environmental Health Perspectives. https://pubmed.ncbi.nlm.nih.gov/18709161/
Madden JA, Powers RH (1990). Effect of cocaine and cocaine metabolites on cerebral arteries in vitro. Life Sciences. https://pubmed.ncbi.nlm.nih.gov/2233129/
Madden JA, et al. (1995). Cocaine and benzoylecgonine constrict cerebral arteries by different mechanisms. Life Sciences. https://pubmed.ncbi.nlm.nih.gov/7869849/
Schreiber MD, et al. (1994). Effects of cocaine, benzoylecgonine, and cocaine metabolites in cannulated pressurized fetal sheep cerebral arteries. Journal of Applied Physiology. https://pubmed.ncbi.nlm.nih.gov/8002536/
Kurth CD, et al. (1993). Cocaine and its metabolites constrict cerebral arterioles in newborn pigs. Journal of Pharmacology and Experimental Therapeutics. https://pubmed.ncbi.nlm.nih.gov/8496809/