How Long Does Cocaine Stay in Your System and How Fast Does it Act?

Last Updated: April 29, 2024

Isaak Stotts Authored by Isaak Stotts, LP
0 sources cited

Cocaine’s mechanism of action includes blocking the reuptake of neurotransmitters responsible for feelings of energy, confidence, and euphoria. It binds to the neurotransmitter receptors and blocks their removal, which results in the increased accumulation of neurotransmitters such as dopamine, serotonin, and norepinephrine. The resulting continuous stimulation leads to pleasurable feelings, as shown in this research.

According to the University of Arizona study, the time it takes for coke to start acting depends on whether it was injected, snorted, or smoked. It also affects how long coke stays in your system. When it is smoked or injected, it reaches the brain the fastest within a few seconds. In the case of snorting, the feeling of high is achieved after 1 to 5 minutes. The mode of intake also affects the period of cocaine staying in the system of an individual.

How Long Does Cocaine Stay in Your System for Drug Tests?

A drug screening test can determine how long cocaine lasts and detect its metabolites in users’ blood, saliva, hair, urine, and sweat. The standard testing window for its detection is about 2-4 days, but this depends on how the test is being carried out. How cocaine stays in your system, especially the blood, saliva, and urine, depends on the sample type and how the test was carried out.

How Long Does Cocaine Stay in Urine?

How long does cocaine stay in your urine is usually 2-4 days. But after binges in chronic users, it can be detectable for up to two weeks. Urine testing is the preferred approach for screening coke use if there is no medical emergency.

How Long Does Cocaine Stay In Blood?

Blood testing is mostly used in emergency situations of acute intoxications. Coke can be detected in a user’s blood for up to 12 hours and its metabolite for up to 48 hours after the last consumption.

How Long Does Coke Stay in Saliva?

Coke’s half-life in the saliva is two hours, which means that it can be detected for only about 1 to 2 days after use.

How Long Does Coke Stay in Sweat?

The peak level of coke in sweat is between 4-24 hours, but it can stay there for several weeks.

How Long Does Cocaine Stay In Hair?

Hair testing is the most reliable test. It has the advantage of the largest detection window. But it also requires advanced detection techniques, which makes it less practical. The concentration of coke in hair is traceable for at least a month or two.

How Long Does Cocaine Stay in Your System?

Cocaine Half Life

How long cocaine stays in your urine, blood, and saliva depends on their elimination times, which are as follows:

  • Blood – 1.5 hours
  • Urine – 4.1 hours
  • Saliva – 1.2 hours

How is Coke Metabolized?

According to the cocaine mechanism of action, after its ingestion, it is metabolized by the liver. The liver breaks it down into smaller metabolites to be eliminated from the body through urination. The time coke stays in your system also includes its metabolites.

Two busy doctors over the laptop

These Metabolites Include the Following:


An essential composite resulting from the breakdown of coke is benzoylecgonine. It makes up 30-40% of its metabolites. Even with a minimum amount of cocaine, it takes 4-5 days to eliminate benzoylecgonine. A single but large dose of coke leads to 10 days of detox from its metabolites. For regular users of moderate doses, benzoylecgonine can take 20 days to fade.

Ecgonine Methyl Ester

Another metabolite of coke is ecgonine methyl ester, which is metabolized plasma butyrylcholinesterase (BChE). Ecgonine methyl ester does not have any central nervous system effects and may counter some effects of coke.


This metabolite is present in minimum quantities in humans after the process of metabolism completes in the liver.

Factors That Affect Cocaine Metabolism

Certain factors determine how long cocaine lasts and how it is metabolized in your body.

These Include the Following:

  • The quantity of the drug that one uses affects its metabolism; the more it is used, the longer it will stay in the system.
  • The higher the frequency of usage, the longer it will stay in the body.
  • The mode of intake also plays a role in how it is metabolized. If it is smoked or injected, it will leave the body faster than if it was snorted.
  • The quality of coke and how pure it is also affects the metabolism.
  • The build and weight of the user also affect the time it stays in your system.
  • Taking it with alcohol will slow down the metabolism.

Urine sample for cocaine drug testing.

Testing For Cocaine Metabolites

After coke is eliminated from the body, its metabolites remain for some time. According to this study about the elimination of coke and its metabolites from urine, the following metabolites remain after its elimination:

  • Benzoylecgonine BE
  • Ecgonine methyl ester EME
  • Norcocaine
  • Nor Benzoylecgonine (NBE)
  • m-hydroxybenzoylecgonine mOHBE
  • p-hydroxybenzoylecgonine pOHBE
  • m-hydroxycocaine
  • p-hydroxycocaine

Some of the tests which can detect cocaine and its metabolites include:

  • The 10-panel drug test
  • The 6-panel test
  • Urine testing
  • Blood testing
  • Saliva testing
  • Hair follicles testing

Benzoylecgonine happens to have a much longer half-life than cocaine; it can reach six hours, sometimes more. And even longer in chronic users. So it takes much longer to get eliminated from the body than cocaine. It can even be detectable for several months in some specific tests. That is why it is the preferred substance to detect when testing for its abuse.

Immunoassays are drug tests that aim to detect benzoylecgonine. If coke itself can be traceable in minuscule amounts in the first hours of substance use, there is more time for its metabolites. Sporadic users will test positive for benzoylecgonine for the next 4-5 days, while that can go up to 12-20 days for chronic users. A level of 2 ng of benzoylecgonine per mL or urine is the threshold for declaring a positive drug test result. That makes benzoylecgonine a preferred substance to test for coke abuse.

Cocaine False Positive

The most common screening method for coke use is a urine test for benzoylecgonine. However, some laboratories with less accurate technology available sometimes obtain false positives. Certain medicines produce metabolites with a somewhat similar structure to benzoylecgonine while some other substances may cause a false positive.

True and false symbols.

The Аollowing Substances May Cause a False Positive Test Result:

  • Medications such as lidocaine or novocaine, which are in common anesthetics used by dentists.
  • Coca leaf tea may cause a false positive for coke.
  • Patients with chronic kidney or liver diseases can also produce these metabolites, causing a false positive.

What Else One Should Know

Long-term cocaine usage leads to its accumulation in the body’s fatty tissues, particularly in the liver—every subsequent dose results in adding another fraction to the stock. As a result, this person has a permanent drug that releases in the bloodstream. Time it stays in the system can even lead to serious cocaine side effects and disorders. Professional help in such a case is highly important so that its addiction can be broken and the user can start to live a sober and healthy life. If addiction is suspected, one should contact a professional rehabilitation and addiction treatment center to guide the user and provide all the relevant information. Total detoxification of coke in long-term consumers usually takes six months, which can best be possible in a professional detox facility.

Page Sources

  1. Smith M. L., Shimomura E., Paul B. D., Cone E. J., Darwin W. D., Huestis M. A. Urinary excretion of ecgonine and five other cocaine metabolites following controlled oral, intravenous, intranasal, and smoked administration of cocaine. Journal of Analytical Toxicology. 2010; 34(2): 57–63. doi:10.1093/jat/34.2.57.
  2. Jufer R. A. et al. Elimination of cocaine and metabolites in plasma, saliva, and urine following repeated oral administration to human volunteers. Journal of Analytical Toxicology. 2000; 24(7): 467-77.
  3. Ropero-Miller J. D. & Stout P. R. Analysis of Cocaine Analytes in Human Hair: Evaluation of Concentration Ratios in Different Hair Types, Cocaine Sources, Drug-User Populations, and Surface-Contaminated Specimens. U.S. Department of Justice. 2009.
  4. National Institute on Drug Abuse, How Does Cocaine Produce Its Effects,
  5. The University of Arizona, Pharmacology of Cocaine,
  6. John R. Richards; Erik G. Laurin., Cocaine,
  7. Charles W Schindler and Steven R Goldberg, Accelerating cocaine metabolism as an approach to the treatment of cocaine abuse and toxicity, Future Med Chem, 2012,
  8. Marilyn A. Huestis, W. David Darwin, Eric Shimomura, Shairose A. Lalani, Daniel V. Trinidad, Amanda J. Jenkins, Edward J. Cone, Aaron J. Jacobs, Michael L. Smith, and Buddha D. Paul, Cocaine and Metabolites Urinary Excretion after Controlled Smoked Administration, Journal of Analytical Toxicology, 2011,

Published on: September 26th, 2016

Updated on: April 29th, 2024

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