Coca Leaves

Stimulant

Coca leaves are the leaves of the South American shrub Erythroxylum coca, chewed or brewed as a mild stimulant for energy, appetite suppression and altitude sickness. The whole leaf is far milder than the isolated alkaloid cocaine derived from it.

Also known as: Coca, Coca leaf, Erythroxylum coca, Mama Coca, Hayo, Acullico, Mambe

Written by Psymerge Editorial Team · Last updated June 4, 2026

Key facts

Category
Stimulant
Onset
A few minutes (chewing); ~10–20 minutes (tea)
Peak
Roughly 30–60 minutes
Total duration
About 1–2 hours of mild effect
After-effects
Generally minimal; possible mild restlessness or trouble sleeping if used late in the day

Overview

Coca is one of the oldest cultivated plants of the Andes, where chewing the leaf (with an alkaline additive) and drinking coca tea have been part of daily life and ritual for thousands of years. As a whole-plant preparation, coca produces mild stimulation, reduces fatigue, hunger and thirst, and is widely used to cope with high-altitude conditions.

Coca is also the source of cocaine, but the whole leaf and the purified drug are pharmacologically very different. Whole leaves contain only about 0.1–1% cocaine by weight alongside some seventeen other, milder alkaloids, and traditional chewing releases these slowly. As a result, peak blood concentrations from chewing are roughly fifty times lower than from cocaine isolates, and traditional use is not associated with the dependence or acute toxicity seen with cocaine (Biondich & Joslin, 2016; Restrepo et al., 2019). This page covers the traditional whole-leaf use and is educational, not an endorsement.

History & origins

Archaeological evidence places coca use in the Andes back several thousand years. The word "coca" derives from the Aymara "khoka", meaning "the tree". Cocaine was first isolated from the leaf in 1860, and through the late nineteenth and early twentieth centuries coca extracts appeared in tonics and beverages before tightening regulation. Today the whole leaf remains legal and culturally central in countries such as Bolivia and Peru, even though it is listed under Schedule I of the 1961 UN Single Convention — a status currently under review by the WHO Expert Committee on Drug Dependence (Biondich & Joslin, 2016).

Pharmacology & how it works

Coca's principal psychoactive alkaloid is cocaine, which blocks the reuptake of dopamine, norepinephrine and serotonin, producing stimulant effects. In the whole leaf, cocaine is present at low concentration and is absorbed slowly and only partially through the mouth and gut, so blood levels stay low and the effect is mild. The leaf's other tropane alkaloids are generally less active and may contribute to its distinct, gentler profile (Novak et al., 1984; Restrepo et al., 2019).

Chemical class
Plant material (leaves of Erythroxylum coca) containing tropane alkaloids — chiefly cocaine (~0.1–1%) plus ~17 minor alkaloids — alongside vitamins and minerals
Routes of administration
Oral — chewing a leaf quid (usually with an alkaline additive), Oral — infusion (coca tea / mate de coca), Oral — coca leaf flour as a supplement
Tolerance
Some tolerance to stimulant effects can develop with regular use; traditional patterns of leaf use are typically moderate and habitual rather than escalating.

Pharmacokinetics

Chewed or brewed, coca's alkaloids are absorbed gradually, giving a mild effect within minutes that lasts one to two hours. Peak cocaine blood concentrations from traditional chewing are on the order of fifty times lower than from purified cocaine, which largely explains the difference in effect and risk (Biondich & Joslin, 2016).

Effects

Physical Effects

  • Mild increase in energy, alertness and endurance
  • Suppression of hunger, thirst and fatigue
  • Reduced symptoms of altitude sickness
  • Numbing of the mouth and a mild local-anaesthetic effect
  • Slight increase in heart rate and blood pressure
  • Aid to digestion (traditional use)

Psychological Effects

  • Mild stimulation and improved mood
  • Increased focus and sociability
  • Reduced sense of effort during physical work

Spiritual Effects

  • Used as a sacred offering and in divination and ceremony in Andean traditions

Dosage Information

Traditionally consumed as a chewed quid or as tea. Heavy traditional chewers may use on the order of 60 g of leaf spread across a day, releasing alkaloids slowly. Whole leaves contain roughly 0.1–1% cocaine by weight. There is no standardized recreational dose, and concentrated extracts behave very differently from the whole leaf. Educational only and not an endorsement.

Risks & safety

Contraindications

Because coca has mild sympathomimetic (stimulant) effects, caution or avoidance is advised for:

  • Cardiovascular conditions: heart disease, arrhythmias, or high blood pressure.
  • Pregnancy and breastfeeding: stimulant alkaloids cross to the fetus and safety is not established.
  • Anxiety disorders or insomnia, which stimulants can worsen.
  • People taking MAOIs or other stimulants (see interactions).

Drug interactions

Coca's alkaloids are sympathomimetic, so the main cautions involve other stimulating or pressor drugs:

  • MAOIs: combining with monoamine-affecting drugs can raise blood pressure dangerously.
  • Other stimulants (caffeine, amphetamines, decongestants): additive cardiovascular strain.
  • Cardiac and blood-pressure medication: effects may be altered; consult a clinician.

Note that drinking coca tea can cause a positive urine test for cocaine metabolites for some time afterwards.

Psychological distress & bad trips

Whole-leaf coca rarely causes significant psychological distress; at most, larger amounts or extracts can produce restlessness, anxiety or insomnia. Distress and compulsive use are characteristic of concentrated cocaine, not traditional leaf chewing.

Rare but serious risks

For traditional whole-leaf use, serious harm is uncommon: animal studies show low acute toxicity and no fatal overdoses have been reported from traditional use. The major risks lie elsewhere:

  • Concentrated products: extracts, pastes and especially purified cocaine carry the well-known cardiovascular, neurological and addiction risks of cocaine, which the whole leaf does not.
  • Cardiovascular strain in susceptible people, since even mild stimulants raise heart rate and blood pressure.
  • Legal risk: coca leaf is internationally controlled, and possession outside producing/traditional-use countries may be illegal.

Vulnerable populations

People who are pregnant or breastfeeding, those with heart disease, high blood pressure or arrhythmias, and people prone to anxiety or insomnia should avoid coca. Children and adolescents should not use it.

Dependency & addiction potential

Traditional whole-leaf coca use is not associated with significant dependence or abuse in the available ethnographic evidence, in large part because alkaloids are absorbed slowly and at low concentration (WHO ECDD; Biondich & Joslin, 2016). This is in sharp contrast to cocaine, which is strongly reinforcing and highly addictive.

Overdose

Overdose from traditional whole-leaf use is not a recognised problem, and no fatal overdoses have been reported from such use. The danger of overdose belongs to concentrated cocaine, where high blood levels can cause heart arrhythmias, seizures, stroke and death.

Harm Reduction

  • Understand that whole coca leaf and cocaine are very different: the leaf is a mild stimulant, while concentrated cocaine carries serious cardiovascular and addiction risks.
  • Avoid coca if you have heart disease, high blood pressure, an arrhythmia, an anxiety disorder, or are pregnant or breastfeeding.
  • Do not combine with MAOIs or other stimulants such as high-dose caffeine or decongestants.
  • Be aware that coca tea can produce a positive cocaine drug test for some time.
  • Check local laws: coca leaf is internationally controlled and illegal in many countries outside its traditional-use regions.
  • Avoid use late in the day to reduce sleep disruption.

Cultural & spiritual context

For Andean and Amazonian peoples, coca is sacred and social: it is offered to the earth (Pachamama), used in divination and ceremony, shared at communal work and life events, and chewed to sustain labour at altitude. The practice of chewing a quid of leaves with an alkaline substance (cal or llipta) is known as acullico or mambeo. Coca leaf flour is also sold as a nutritional supplement. This cultural use is distinct from, and predates, the production of cocaine.

Legal Status

Laws vary widely by country and change frequently, so we don't track legal status here to avoid showing outdated information.

Check current worldwide legal status on Psychedelic Alpha

Frequently asked questions

Is chewing coca leaves the same as using cocaine?

No. Coca leaves contain only about 0.1–1% cocaine and release it slowly, so blood levels and effects are far milder — peak concentrations are roughly fifty times lower than from purified cocaine. Traditional leaf use is not linked to the dependence and toxicity of cocaine (Biondich & Joslin, 2016).

Are coca leaves addictive?

Traditional whole-leaf use is not associated with significant dependence in the available evidence, largely because of slow, low-level alkaloid absorption. Concentrated cocaine, by contrast, is strongly addictive.

Why do people use coca at high altitude?

Coca reduces fatigue, hunger and thirst and is traditionally used to ease symptoms of altitude sickness; coca tea is commonly offered to visitors in the Andes for this reason.

Can coca tea make me fail a drug test?

Yes. Drinking coca tea can cause a positive urine test for cocaine metabolites for some time afterwards, even though the effects of the tea are mild.

Is coca leaf legal?

It is legal and culturally central in some Andean countries but is listed under Schedule I of the 1961 UN Single Convention and is illegal in many other countries. Check local law before obtaining or carrying it.

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References & further reading

  • Biondich, A. S., & Joslin, J. D. (2016). Coca: the history and medical significance of an ancient Andean tradition. Emergency Medicine International, 2016, 4048764. https://doi.org/10.1155/2016/4048764
  • Restrepo, D. A., et al. (2019). Erythroxylum in focus: an interdisciplinary review of an overlooked genus. Molecules, 24(20), 3788. https://doi.org/10.3390/molecules24203788
  • Novak, M., Salemink, C. A., & Khan, I. (1984). Biological activity of the alkaloids of Erythroxylum coca and Erythroxylum novogranatense. Journal of Ethnopharmacology, 10(3), 261–274. https://doi.org/10.1016/0378-8741(84)90015-1
  • World Health Organization, Expert Committee on Drug Dependence (ECDD). Critical Review Report: Coca leaf (48th meeting). https://www.who.int/teams/health-product-and-policy-standards/controlled-substances/ecdd
  • United Nations Office on Drugs and Crime (UNODC). Coca / cocaine. https://www.unodc.org/
  • European Monitoring Centre for Drugs and Drug Addiction (EMCDDA). Cocaine drug profile. https://www.emcdda.europa.eu/publications/drug-profiles/cocaine
  • Erowid. Coca Vault. https://www.erowid.org/plants/coca/

About this article

Written by:
PE
Psymerge Editorial Team
Last updated June 4, 2026