Cocaine
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Cocaine — coke, blow, snow — is a naturally-occurring stimulant of the tropane alkaloid class. It is the principal alkaloid of the coca plant, distinguished from other stimulants by its short duration and high reinforcement potency. Cocaine is a triple monoamine reuptake inhibitor, producing its effects by simultaneously blocking dopamine, norepinephrine, and serotonin transporters.[1]
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Albert Niemann isolated cocaine from coca leaves in 1860, and Carl Koller demonstrated its use as the first clinical local anesthetic in 1884. Widespread recreational use and the crack epidemic of the 1980s led to international prohibition, though the compound retains limited medical approval for topical nasal anesthesia. Approximately 25 million people use cocaine globally,[2] and no FDA-approved pharmacotherapy exists for cocaine use disorder.[3]
Subjective effects include euphoria, psychomotor activation, confidence, thought acceleration, and cardiovascular arousal. The experience is defined by its abruptness — an intense but fleeting peak that drops sharply into restless dysphoria, producing a steeper euphoria-to-comedown arc than any commonly used stimulant. Anxiety, paranoia, compulsive redosing, and cardiovascular strain are characteristic unsought effects.
Cocaine produces low physical but high psychological dependence, and cardiovascular toxicity is the primary cause of cocaine-related death.[4] Blood levels cannot reliably predict lethality; chronic use produces cumulative cardiac structural changes that lower the threshold for fatal arrhythmia, and individual genetic factors dramatically modify risk.[5] Cocaine is among the most extensively studied psychoactive substances, with over a century of clinical and pharmacological research.
History[edit]
Discovery
Coca leaves have been chewed by Andean peoples for millennia for mild stimulation and altitude adaptation. In 1860, Albert Niemann isolated the active alkaloid at the University of Göttingen and named it "cocaine," noting its numbing effect on his tongue — the first observation of local anesthetic activity.[6] Wilhelm Lossen determined the correct molecular formula five years later.
Clinical and Cultural Significance
In 1884, Carl Koller demonstrated that topical cocaine rendered the cornea insensible, enabling eye surgery without general anesthesia — the first clinical local anesthetic application.[7] William Halsted and Richard Hall soon extended cocaine to nerve blocks and regional anesthesia,[6] while Sigmund Freud's promotion of the drug for morphine dependence became an early cautionary example of iatrogenic addiction.
Prohibition and Modern Use
The Harrison Narcotics Tax Act of 1914 imposed the first major US federal restrictions on cocaine, and the 1961 UN Single Convention placed it in Schedule I and IV internationally. A resurgence in the 1970s–1980s brought powder cocaine into affluent social circles, followed by the crack epidemic — which introduced smokeable free-base cocaine at lower cost and dramatically accelerated addiction trajectories. Today, cocaine retains limited medical use as a topical anesthetic-vasoconstrictor in ENT surgery and serves as the prototypical compound in addiction neuroscience for studying reward circuitry and compulsive use.[8][9]
The name "cocaine" derives from "coca" (the Quechua-origin name for the Erythroxylum plant) plus the chemical suffix "-ine." Street names reflect the substance's two dominant forms: powder hydrochloride (coke, blow, snow) and smokeable free base (crack, rock).
Chemistry[edit]
Structural Class
Cocaine belongs to the tropane alkaloid family, built on the bicyclic tropane scaffold — the same ring system found in atropine and scopolamine. It is the principal alkaloid of Erythroxylum coca, constituting 0.5–1.0% of dried leaf mass. Two ester groups — a methyl ester at C-2 and a benzoate ester at C-3 — are essential for both its stimulant and local anesthetic activity; removal of either eliminates potency.
| Molecular formula | C₁₇H₂₁NO₄ |
| Molecular weight | 303.35 g/mol |
Stereochemistry
Cocaine has four stereocenters, yielding sixteen possible stereoisomers. The naturally occurring form is the (1R,2R,3S,5S) enantiomer — the pharmacologically active isomer; its mirror image lacks significant activity at the DAT.[6] The relative orientation of the C-2 and C-3 substituents (both on the same face of the tropane ring) is required for optimal binding — the structural isomer pseudococaine, in which one substituent flips to the opposite face, is inactive as a stimulant.
Physical Forms
Cocaine hydrochloride is a white crystalline powder, highly water-soluble, administered intranasally or intravenous. It cannot be efficiently smoked — thermal decomposition occurs before vaporization.
Cocaine free base ("crack") is an off-white to yellow solid with a much lower melting point (~98°C), allowing it to volatilize cleanly for inhalation. The conversion from hydrochloride to free base using sodium bicarbonate or ammonia is the chemical basis of crack cocaine. Both forms degrade in alkaline or aqueous conditions but remain stable when stored cool and dry.
Pharmacology[edit]
Mechanism of Action
Cocaine is a triple monoamine reuptake inhibitor — it blocks the DAT (DAT), NET (NET), and SERT (SERT) simultaneously by locking each transporter in its outward-facing conformation, preventing monoamine recycling.[1] All three transporters are inhibited within a narrow affinity range, but the reinforcing and psychostimulant effects are driven primarily by DAT blockade in the nucleus accumbens, where rapid dopamine accumulation activates reward circuitry.[10][11]
NET blockade produces the peripheral stimulant effects — vasoconstriction, elevated heart rate, and raised blood pressure. SERT blockade contributes mood-altering properties and modulates the dopamine response.[1]
Cocaine also blocks voltage-gated sodium channels in a use-dependent manner, accounting for its local anesthetic properties and contributing to cardiac toxicity — slowed cardiac conduction and QRS widening on ECG.[12][4] This mechanism is distinct from its stimulant action and additive with it.
DAT occupancy of at least 60% is required for cocaine's reinforcement, based on PET imaging.[11] In chronic users, dopamine responses to cocaine itself are blunted while responses to cocaine-associated cues are amplified — a discrepancy that drives compulsive use patterns.
Pharmacokinetics
Route of administration is the single most important variable in cocaine pharmacology. Faster routes produce more rapid dopamine transporter occupancy, which correlates directly with reinforcement intensity and addiction liability.[13]
Smoked (free base) and intravenous cocaine reach the brain within seconds, producing near-instantaneous onset and the characteristic "rush." Intranasal cocaine absorbs through the nasal mucosa over several minutes, with peak effects delayed by cocaine's own vasoconstrictive action slowing its absorption. Oral cocaine undergoes extensive first-pass metabolism, reducing bioavailability to roughly 30–45%[14] and producing a mild, gradual stimulation.
Plasma half-life is approximately 1–1.5 hours regardless of route.[14][15] The subjective experience is far shorter than the half-life suggests — euphoric effects peak and fade well before cocaine clears the blood, driving compulsive redosing.
Metabolism
The body breaks cocaine down primarily through hydrolysis — plasma and liver enzymes cleave its ester bonds to produce benzoylecgonine (the major inactive metabolite and standard urine drug screen marker, detectable for 2–4 days with routine use and over 10 days with heavy use) and ecgonine methyl ester. A smaller fraction is converted to norcocaine, a pharmacologically active metabolite that generates reactive oxygen species and is the principal agent of cocaine-related liver damage.[16][17]
When cocaine and alcohol are consumed together, liver enzymes produce cocaethylene — a metabolite with stimulant potency comparable to cocaine but a longer duration of action.[18][19] Alcohol simultaneously slows cocaine's normal breakdown pathway, raising cocaine and norcocaine levels in the blood.[18]
Smoked cocaine produces the unique pyrolysis metabolite anhydroecgonine methyl ester, detectable in saliva and used as a specific biomarker for the smoked route.[20]
Neuroscience[edit]
Where It Acts
Cocaine's reinforcement center on the mesolimbic pathway — neurons projecting from the ventral tegmental area to the nucleus accumbens. DAT blockade here floods the synapse with dopamine, activating reward and approach circuitry.[10] Brain imaging shows that at least 60% of dopamine transporters must be occupied for a user to feel the subjective high, and the speed of that occupancy — not just the degree — determines how reinforcing a given dose feels.[11][13] This explains why smoked and intravenous routes produce far greater addiction liability than oral use.
Chronic cocaine exposure progressively rewires this circuitry. Dopamine D2/D3 receptors decline in the striatum,[21] metabolic activity drops in prefrontal regions responsible for impulse control,[11] and the dopamine transporter itself becomes "primed" — even after two months of abstinence, a single re-exposure reinstates tolerance to cocaine's effects at DAT.[22]
Why It Matters
The dominant framework for understanding cocaine addiction is the transition from wanting to compulsion. Repeated use sensitizes the brain's "wanting" circuitry — cue reactivity and craving intensify — while simultaneously blunting the "liking" response through D2 receptor downregulation.[11] The user wants more while enjoying less. Behaviorally, drug-seeking shifts from voluntary, goal-directed action (mediated by the ventral striatum) to automatic, habitual patterns (mediated by the dorsal striatum)[8][23] — the neurobiological substrate of compulsive use.
Cue-induced craving paradoxically increases rather than decreases during abstinence, peaking weeks to months after last use.[9] Faster routes of delivery produce greater incubation of craving, reinforcing the clinical observation that smoked and injected cocaine carry the highest relapse risk.
Only 15–20% of cocaine users develop cocaine use disorder — what determines individual vulnerability remains unclear. The finding that a single re-exposure reinstates DAT tolerance after prolonged abstinence[22] suggests molecular changes that persist far longer than behavioral recovery, but whether these can be pharmacologically reversed is unknown.
Subjective Effects[edit]
Cocaine's experiential character is inseparable from its route of administration. Smoked and intravenous cocaine deliver an explosive rush — a sudden, total-body euphoric surge that peaks within seconds and drops steeply into agitated restlessness. Intranasal cocaine builds more gradually into confident, talkative stimulation. Oral cocaine, rarely encountered in purified form, produces mild alertness closer to strong coffee than to the stereotypical cocaine experience. Context amplifies the direction of the high: social settings bring out sociability and expansiveness, while solitary use can tilt toward anxious self-focus or paranoia.
Among stimulants, cocaine is uniquely short-acting — briefer than amphetamine, methamphetamine, or methylphenidate — and more serotonergically active, lending a distinct mood warmth absent from purely dopaminergic stimulants. It is the abrupt offset, not the peak, that most defines cocaine: the steep drop from euphoria to dysphoria is the pharmacological engine of compulsive redosing and binge patterns.
Effect Grid
At common doses, the full cocaine experience emerges: pronounced euphoria, strong confidence and ego inflation, significant thought acceleration and focus enhancement, increased sociability and talkativeness, and psychomotor activation. Users report heightened sensory appreciation and motivation enhancement. The stimulant character is unmistakable — energy, alertness, and a sense of capability dominate the experience.
Cardiovascular effects are significant: tachycardia, elevated blood pressure, vasoconstriction, and pupil dilation. Appetite is strongly suppressed. Jaw tension (bruxism) and restlessness are common. Body temperature may rise.
Effects peak within 15–30 minutes by insufflated route and fade noticeably by 45–60 minutes, often prompting desire to redose. Sleep is impaired for 1–3 hours after last dose.
Modeled from the effect's dose-dependence curve — not per-substance measurements.
Auditory hallucinations · External hallucinations
Wakefulness · Body high · Insomnia · Respiratory stimulation · Dehydration sensation · Dry mouth · Heart rate perception changes · Physical fatigue · Restlessness · Tactile euphoria · Excessive sweating · Muscle tension · Nasal congestion · Pain suppression · Sexual arousal enhancement · Abnormal heartbeat · Bruxism · Headache · Tingling / electric sensations · Spontaneous body sensations · Sexual arousal suppression · Nausea · Motor control enhancement · Increased urination · Respiratory depression · Dizziness · Seizure threshold reduction · Trembling · Involuntary body movements · Vomiting · Tactile hallucination
Respiratory stimulation · Dehydration sensation · Dry mouth · Heart rate perception changes · Physical fatigue · Restlessness · Tactile euphoria · Excessive sweating · Muscle tension · Nasal congestion · Pain suppression · Sexual arousal enhancement · Bruxism · Headache · Tingling / electric sensations · Spontaneous body sensations · Sexual arousal suppression · Nausea · Motor control enhancement · Increased urination · Respiratory depression · Dizziness · Seizure threshold reduction · Trembling · Involuntary body movements · Vomiting · Tactile hallucination
Motivation suppression · Cognitive dysphoria · Motivation enhancement · Thought deceleration · Focus enhancement · Cognitive impairment · Suggestibility suppression · Aesthetic enhancement · Analysis enhancement · Information processing enhancement · Language enhancement · Thought organization · Creativity enhancement · Memory suppression · Memory enhancement · Confusion · Delusions
Thought deceleration · Focus enhancement · Cognitive impairment · Suggestibility suppression · Aesthetic enhancement · Analysis enhancement · Information processing enhancement · Language enhancement · Thought organization · Creativity enhancement · Memory suppression · Memory enhancement · Confusion
Anhedonia · Dysphoria · Emotional lability · Mania
Communication enhancement · Sociability enhancement
Timeline
Gradual onset as cocaine is absorbed through the gastrointestinal tract. First-pass hepatic metabolism reduces bioavailability to 32–45%. Initial awareness is subtle — mild alertness and faint mood elevation.
Slow build of stimulation and mood elevation over 40–50 minutes. Effects are notably more gradual and less euphoric than insufflated or smoked routes.
Moderate stimulation, mood elevation, and increased sociability. Peak effects are less intense than equivalent insufflated doses due to lower bioavailability and slower absorption. Cardiovascular effects are present but less acute.
Gradual decline in stimulation. Comedown is less abrupt than fast-onset routes, with milder dysphoria and less intense redosing urge.
Mild fatigue and residual appetite changes. The oral route produces the least pronounced crash of any cocaine ROA.
⚠ Do not drive or operate machinery until all residual stimulant effects and fatigue have fully resolved.
Safety[edit]
- Acute toxicity
- High
- Chronic toxicity
- High
- Withdrawal
- Moderate
- Tolerance buildup
- rapid
- Tolerance reset
- 14 days
- Physical
- Low
- Psychological
- High
- Compulsive redosing
- High
- Dose escalation
- High
- Cross-tol.
- amphetamine · methamphetamine · methylphenidate
Toxicity
Acute Toxicity
There is no established lethal dose for cocaine — blood levels cannot reliably predict whether a given dose will be fatal.[5] Most deaths occur in people with pre-existing cardiac changes from chronic use or genetic susceptibility to heart rhythm abnormalities.[5]
The acute overdose syndrome is one of stimulant excess: rapid heart rate, high blood pressure, dangerously elevated body temperature, sweating, agitation, and dilated pupils. In severe cases, coronary artery spasm, fatal heart rhythm disturbances, seizures, and stroke can follow. Dangerously elevated body temperature is a primary mechanism of death and can kill independently of heart effects; physical exertion during use substantially amplifies this risk.[25]
Heart and Circulation
Cocaine damages the heart through two simultaneous mechanisms[12][4]: it floods the body with stress hormones (via norepinephrine and DAT blockade), causing blood vessel constriction, elevated heart rate, and increased oxygen demand on the heart; and it blocks sodium channels in heart muscle, slowing electrical conduction and creating the substrate for fatal rhythm disturbances.
Cocaine users carry a 7-fold elevated heart attack risk.[26] Documented complications include coronary artery spasm and heart attack, dangerously high blood pressure, aortic tear, abnormal heart rhythms, sudden cardiac death, heart muscle inflammation, enlarged heart, and heart valve infection.[26][12] Chronic use accelerates the buildup of arterial plaque.[12]
Beta-blockers are contraindicated in cocaine-related heart emergencies — they worsen coronary artery spasm by leaving epinephrine's vessel-constricting effects unopposed. Certain antiarrhythmic drugs (Class Ia and III) are also contraindicated due to additive sodium channel blockade.[27]
Lungs
Smoked cocaine produces a range of lung injuries: collapsed lung, airway damage, asthma flares, lung bleeding, fluid in the lungs, and scarring from inhaled contaminants.[28] Lung bleeding (alveolar hemorrhage) has been documented in multiple case series, with favorable recovery when cocaine use stops.[29]
Nasal and Facial Destruction
Chronic snorting can cause progressive tissue death in midline facial structures — nasal septum, palate, sinuses — through a combination of blood vessel constriction and an apparent autoimmune response.[30][31] Severe cases extend to the skull base. This condition can mimic a rare autoimmune disease (granulomatosis with polyangiitis), leading to misdiagnosis and harmful immunosuppressive treatment.[30]
Liver Damage
The cocaine metabolite norcocaine generates reactive oxygen species that destroy liver cells, particularly in the liver's central zones.[16][17] Cocaethylene — formed when cocaine and alcohol are used together — carries comparable liver toxicity.[19]
Kidney Damage
Cocaine can cause acute kidney failure through muscle breakdown (releasing proteins that damage kidney tubules), constriction of kidney blood vessels, and blood clotting abnormalities.[32]
Stroke
Cocaine is an independent risk factor for both clot-based and bleeding strokes, particularly in people under 55.[33] Mechanisms include blood pressure spikes, brain vessel spasm, and impaired blood clotting.[24]
Multiorgan Failure
Fatal cocaine toxicity can produce simultaneous failure of multiple organ systems: cardiac shock, muscle breakdown, kidney failure, liver injury, and severe metabolic imbalance.[34]
Pregnancy
Cocaine crosses the placenta and constricts fetal blood vessels. Prenatal exposure is associated with miscarriage, restricted fetal growth, preterm birth, decreased birth weight and head circumference, and neurobehavioral effects in newborns.[35]
Psychological Risks
Cocaine frequently induces transient psychotic symptoms — paranoid beliefs, hallucinations, and suspiciousness. In cocaine-dependent populations, over half report psychotic symptoms during use; in some clinical settings the figure reaches 86.5%.[36][37]
Risk factors include high doses, faster routes of administration (smoking and injection carry higher risk than snorting), co-occurring cannabis dependence, and antisocial personality disorder.[36]
Cocaine produces intense psychological dependence characterized by dysphoria, anhedonia, and craving during abstinence. The incubation of craving — increasing cue-reactivity over weeks of abstinence[9] — makes sustained recovery particularly challenging.
Tolerance and Dependence
Acute tolerance develops within a single session — euphoric effects fade rapidly despite sustained blood levels, driving compulsive redosing and binge patterns.
Chronic tolerance builds with repeated use through dopamine downregulation and persistent changes to the dopamine transporter. After extended abstinence, tolerance appears to reset — but a single re-exposure fully reinstates it, revealing permanent molecular "priming".[22]
Sensitization develops simultaneously: while tolerance reduces the high, sensitivity to locomotor activation, cue-reactivity, and craving increases with repeated use.[11][10] This paradox — wanting more while feeling less — is the neurobiological engine of binge-crash cycles.
Physical dependence is low. Cocaine withdrawal produces fatigue, low mood, excessive sleep, appetite enhancement, and psychomotor slowing — unpleasant but not medically dangerous.
Psychological dependence is among the highest of any drug — in laboratory settings, animals will self-administer cocaine to the exclusion of food, water, and sleep.[8]
Cross-tolerance exists with other dopaminergic stimulants (amphetamine, methamphetamine, methylphenidate) through shared receptor and transporter adaptations.[21]
Drug Interactions
Alcohol
The most common and most dangerous cocaine combination. Liver enzymes convert cocaine in the presence of alcohol into cocaethylene — a metabolite with comparable stimulant potency, similar liver toxicity, and a longer half-life than cocaine itself.[18][19] The combination is confirmed more potent and more toxic than either substance alone.[13] Alcohol simultaneously slows cocaine's normal breakdown, raising exposure to both cocaine and its toxic metabolites.[18]
MAO Inhibitors
Cocaine prevents monoamine reuptake; MAOIs prevent monoamine breakdown. The combination produces extreme catecholamine accumulation and severe hypertensive crisis risk. This includes substances with monoamine oxidase-inhibiting properties such as αMT.safety citation needed
Serotonergic Agents
Cocaine's SERT blockade creates additive serotonin syndrome risk when combined with other serotonergic drugs, including dxm and 5-MeO tryptamines.safety citation needed
Sympathomimetic Stimulants
Combination with other stimulants (including NBOMe compounds) produces additive cardiovascular stress — compounded vasoconstriction, elevated heart rate, and dangerous blood pressure spikes.safety citation needed
Dissociatives
PCP, methoxetamine, and related dissociatives combined with cocaine produce additive cardiovascular stimulation.safety citation needed
Contraindications
Heart rhythm or conduction abnormalities: Cocaine's sodium channel blockade compounds existing conduction problems, creating high risk for fatal arrhythmias. Genetic long QT syndrome variants substantially increase susceptibility to cocaine-induced sudden death.[5]
Coronary artery disease: Cocaine-induced vessel spasm and increased cardiac oxygen demand in the presence of narrowed arteries produces heart attack. The 7-fold risk elevation applies to the general cocaine-using population; pre-existing coronary disease raises the risk further.[26]
High blood pressure: Cocaine's acute blood pressure spike is additive with chronic hypertension, increasing risk of hypertensive emergency, aortic tear, and hemorrhagic stroke.
Prior stroke or brain aneurysm: Cocaine's vessel-constricting and blood-pressure-raising effects substantially increase recurrent stroke risk.[33]
Liver disease: Reduced enzyme activity prolongs cocaine exposure, and cocaine is directly toxic to the liver via the norcocaine pathway.[16]
Pregnancy: Cocaine crosses the placenta, constricts fetal blood vessels, and is associated with miscarriage, growth restriction, preterm birth, and neurobehavioral effects.[35]
Psychiatric vulnerability: Over 50% of cocaine-dependent individuals experience psychotic symptoms during use.[36] Pre-existing psychotic disorders or family history increases the risk of prolonged psychosis.
Beta-blocker use: Cocaine plus beta-blockers produces unopposed alpha-adrenergic stimulation, worsening coronary artery spasm.[27]
Harm Reduction[edit]
Forms & Identification
Cocaine circulates in two fundamentally different forms — powder (hydrochloride salt) and crack (free base) — and the distinction matters for every aspect of harm reduction, from testing to dosing to route-specific risks. Purity varies enormously: seized samples range from under 20% to over 80% cocaine, with the remainder consisting of cutting agents that may be inert (mannitol, lactose), pharmacologically active (levamisole, phenacetin, lidocaine), or dangerous. Reagent testing confirms presence of cocaine but cannot determine purity or identify every adulterant — fentanyl test strips are an essential supplementary check in any market where opioid contamination has been documented.
Guidelines
- Test every batch with a reagent kit and, where fentanyl contamination is a local concern, a fentanyl test strip
- Set a quantity limit before the session and separate what you intend to use from the rest
- Stay hydrated but avoid alcohol — cocaethylene formation increases both toxicity and duration of cardiac strain
- Avoid physical exertion during use; dangerously elevated body temperature is a primary mechanism of cocaine-related death
- Use your own straw or implement for insufflation — shared straws transmit blood-borne infections through damaged nasal tissue
- Alternate nostrils and rinse nasal passages with saline after a session to reduce mucosal damage
- If you have any heart condition, conduction abnormality, or high blood pressure, cocaine carries substantially elevated risk of fatal cardiac events
Set & Setting
Cocaine's short duration and steep comedown create a strong pharmacological pull toward redosing. Deciding on a quantity limit before the session begins — and physically separating the remainder — is more effective than relying on in-session judgment, which cocaine impairs. Social settings amplify confidence and talkativeness but also mask cardiovascular warning signs; solitary use amplifies anxiety and paranoia. Alcohol co-use feels natural but produces cocaethylene, a toxic metabolite that extends cardiovascular strain — the combination is measurably more dangerous than either substance alone.
Aftercare & integration. The cocaine comedown — fatigue, low mood, irritability, and strong craving — is a direct consequence of depleted dopamine signaling and typically peaks 12–48 hours after a session. Sleep is the single most effective recovery tool; do not fight hypersomnia. Eat calorie-dense meals even if appetite feels suppressed during the session — nutritional recovery supports mood stabilization.
Craving intensity increases rather than decreases in the days following use. Recognizing this as a predictable neurochemical pattern — not a failure of willpower — helps prevent the "one more session" cycle. If cocaine use is shifting from occasional to regular, or if sessions are lengthening or quantities increasing, this is the point to reassess honestly.
Recovery & Support
No FDA-approved medication exists for cocaine use disorder, but behavioral therapies — particularly contingency management and cognitive-behavioral therapy — have the strongest evidence base. Cocaine Anonymous and SMART Recovery provide peer support structures. The incubation of craving (increasing cue-reactivity over weeks of abstinence) means that relapse risk peaks not immediately after quitting but weeks to months later — sustained support through this vulnerable window is critical.
For those seeking professional help, addiction medicine specialists and outpatient programs offer structured recovery without requiring residential treatment. Crisis support is available through SAMHSA's National Helpline (1-800-662-4357), which provides free, confidential referrals 24 hours a day.
Recovery resources, crisis lines, and support pathways → View all
Emergency Response
Recognizing an emergency: chest pain, seizure, loss of consciousness, confusion, severe headache, or body temperature you can feel radiating through clothing all indicate a medical emergency. Extreme agitation or paranoia that includes self-harm risk also requires immediate intervention.
Immediate steps:
- Call emergency services immediately
- Keep the person still and cool — remove excess clothing, apply cool (not ice-cold) water to neck, armpits, and forehead
- If the person is unconscious but breathing, place them in the recovery position (on their side, airway clear)
- Do not restrain a seizing person — clear the area around them and protect their head
- Do not give beta-blockers or attempt to "bring them down" with depressants
What to tell the dispatcher: Name the substance (cocaine), estimated amount and route, time of last use, and current symptoms. Good Samaritan laws in many jurisdictions protect people who call for help during a drug emergency.
Legal Status[edit]
Cocaine is controlled under the 1961 United Nations Single Convention on Narcotic Drugs, placed in both Schedule I (high addiction risk, limited therapeutic use) and Schedule IV (most dangerous substances, requiring prohibition of all non-medical use). This international framework forms the basis of most national cocaine legislation. Despite universal prohibition for recreational use, cocaine retains approval as a topical local anesthetic-vasoconstrictor for ENT surgery in most jurisdictions.
| Jurisdiction | Classification | Key provisions |
|---|---|---|
| United States | Schedule II (Controlled Substances Act) | High potential for abuse; medical use retained for topical local anesthesia. Prescription required (written or electronic)[38] |
| United Kingdom | Class A, Schedule 2 (Misuse of Drugs Act 1971) | Class A is the most restrictive category. Possession: maximum 7 years imprisonment. Supply: maximum life imprisonment. Schedule 2 permits limited medical and research use under license. |
| Canada | Schedule I (Controlled Drugs and Substances Act) | Most restrictive schedule (alongside heroin and methamphetamine). No general medical license; limited research exemptions only. |
| Australia | Schedule 8 (Poisons Standard) | Controlled Drug classification. Limited medical use permitted under strict regulatory oversight. |
| European Union | Illegal (all member states, per UN Convention) | National implementation varies. Portugal decriminalized personal possession (2001). Netherlands, Belgium, and Spain show relatively high use prevalence in wastewater surveillance despite prohibition. |
| International | UN Single Convention Schedule I + IV | Schedule IV designation (most dangerous) requires parties to prohibit all non-medical and non-scientific use. Coca leaf is also scheduled. |
Medical Use Provisions
Cocaine 4–10% topical solution is approved across most jurisdictions for mucosal anesthesia in otorhinolaryngology and head and neck surgery. The US Schedule II classification (rather than Schedule I) specifically preserves this medical utility — distinguishing cocaine from substances like heroin (Schedule I) that have no accepted medical use under federal law.
references
- [1] ^abcHan DD, Gu HH (2006) Comparison of the monoamine transporters from human and mouse in their sensitivities to psychostimulant drugs — BMC Pharmacology PMID:16515684
- [2]
- [3] ^Gushken F, Fidalgo TM, Tardelli VS (2025) Cocaine use disorder: no FDA-approved treatments exist — Journal of addiction medicine doi:10.1097/adm.0000000000001580
- [4] ^abcBillman GE (1995) Cocaine cardiotoxicity: toxic mechanisms of the heart — Critical reviews in toxicology PMID:7612173
- [5]
- [6] ^abcGrzybowski A (2007) The history of cocaine in medicine and its importance to the discovery of the different forms of anaesthesia — Klinika oczna PMID:17687926