What Is Cocaine? Effects, Risks, Addiction and Treatment

Cocaine is a powerful central nervous system stimulant derived from coca leaves. In the United States, cocaine is a Schedule II controlled substance. It has limited accepted medical uses as a local anesthetic in certain procedures, but nonmedical cocaine sold as powder or crack is illegal and carries substantial risks of addiction, cardiovascular injury, seizures, stroke, psychiatric complications and overdose.

Cocaine increases dopamine signaling and also affects norepinephrine and serotonin systems. The immediate effects can include increased energy, alertness and euphoria, but they can quickly shift toward anxiety, irritability, paranoia, insomnia, elevated heart rate and blood pressure. Cocaine can trigger a medical emergency even in a person who does not use it regularly.

This is the main cocaine guide for Rehabs.Today. More specific questions are covered in dedicated resources on cocaine withdrawal, how long cocaine stays in your system, cocaine side effects, cocaine addiction, and cocaine overdose.

Cocaine at a Glance

What Is Cocaine?

Cocaine is an alkaloid extracted from leaves of the coca plant. The DEA describes illicit cocaine hydrochloride as a white crystalline powder. Cocaine base, commonly called crack, usually appears as small irregular rocks.

The chemical form affects how the drug is used and how quickly concentrations rise, but both powder cocaine and crack cocaine deliver the same primary psychoactive molecule. The distinction does not make one version safe.

Crack and powder cocaine are covered separately in Crack vs Cocaine.

Is Cocaine a Stimulant?

Yes. Cocaine is a stimulant because it increases activity in the central nervous system and sympathetic nervous system. Heart rate and blood pressure can rise. Pupils may dilate. Appetite can decrease. Sleep becomes difficult, and the person may feel unusually alert or restless.

At higher exposure or with repeated use, the same stimulant effects can become dangerous. Agitation, paranoia, overheating, chest pain, abnormal heart rhythms and seizures can occur.

Is Cocaine an Opioid?

No. Cocaine is not an opioid. It does not act primarily at opioid receptors, and naloxone does not reverse cocaine itself.

That distinction has become more important because illicit cocaine can be contaminated with fentanyl or used at the same time as opioids. When opioid exposure is possible, naloxone can still save a life by reversing the opioid component. See Cocaine and Fentanyl.

How Does Cocaine Affect the Brain?

Cocaine interferes with transporters that normally remove dopamine, norepinephrine and serotonin from signaling spaces between nerve cells. Dopamine is especially important to cocaine’s reward and reinforcement effects.

The resulting dopamine surge can make cocaine strongly reinforcing. The brain begins associating the drug and its surrounding cues with reward. Repeated exposure can produce powerful cravings and a narrowing of attention toward obtaining and using cocaine.

SAMHSA describes stimulant use disorder as involving both reward-system changes and cognitive effects that can interfere with memory, attention, planning and self-control.

What Does Cocaine Do to the Body?

Cocaine’s sympathetic effects can increase heart rate, blood pressure and body temperature. Blood vessels constrict, while the heart may be working harder. This combination helps explain why cocaine can cause chest pain, myocardial infarction, stroke and dangerous arrhythmias.

Other acute effects can include:

• Restlessness
• Anxiety
• Irritability
• Reduced appetite
• Insomnia
• Sweating
• Dilated pupils
• Tremor
• Paranoia
• Agitation

Can Cocaine Cause a Heart Attack?

Yes. Cocaine can increase myocardial oxygen demand while constricting blood vessels that supply the heart. It can also alter electrical conduction and contribute to clot formation. A heart attack can occur in someone without known coronary artery disease.

Chest pain after cocaine use requires medical evaluation. A young age or prior normal heart tests do not rule out a cocaine-related cardiovascular emergency.

Can Cocaine Cause a Stroke?

Yes. Cocaine can contribute to ischemic and hemorrhagic stroke through severe blood-pressure changes, vasoconstriction, vascular injury and other mechanisms.

Sudden weakness, facial droop, speech difficulty, severe headache, loss of coordination or altered consciousness require emergency evaluation regardless of the person’s age.

Can Cocaine Cause Seizures?

Yes. Seizures are a recognized complication of cocaine toxicity. A seizure after suspected cocaine exposure is a medical emergency, particularly when it occurs with overheating, severe agitation, chest pain or altered consciousness.

Can Cocaine Cause Psychosis or Paranoia?

Yes. Cocaine can cause severe anxiety, suspiciousness, paranoia, hallucinations and stimulant-induced psychosis. Risk tends to rise with repeated exposure, sleep deprivation and high-intensity use.

Psychiatric symptoms can continue after the immediate stimulant effects have diminished. A person who is severely agitated, confused, psychotic or at risk of harming themselves or others needs urgent assessment.

How Long Do Cocaine’s Effects Last?

Cocaine’s noticeable effects are relatively short compared with many other stimulants, which can contribute to repeated use during a binge. The exact duration depends on the form, route, amount, pattern of use and individual physiology.

The end of the subjective high does not mean cocaine has become medically irrelevant. Cardiovascular complications can occur during or after apparent intoxication, and metabolites remain detectable much longer than the noticeable effects.

What Is Cocaine’s Half-Life?

Controlled pharmacokinetic studies generally place cocaine’s plasma half-life around an hour, although the reported range varies and elimination can be longer in chronic users. Benzoylecgonine, a major metabolite, persists longer and is the primary target in many urine tests.

A half-life should not be converted into a guarantee about when someone will pass a drug test or when cardiovascular risk has disappeared. See How Long Does Cocaine Stay in Your System? for the detailed testing guide.

What Is Crack Cocaine?

Crack is cocaine base. It is commonly sold as small irregular rocks rather than crystalline powder. The DEA classifies both powder cocaine and crack as cocaine.

Because crack is generally used in a way that produces a rapid rise in cocaine concentration, it can have strong reinforcing effects and can encourage repeated use. The cardiovascular, neurologic, psychiatric and addiction risks remain substantial.

Is Cocaine Ever Used Medically?

Yes, but medical cocaine use is very limited and controlled. Cocaine has local anesthetic and vasoconstrictive properties and can be used in selected medical procedures, particularly involving mucous membranes.

This narrow medical use is one reason cocaine is Schedule II rather than Schedule I. It does not make nonmedical cocaine safe or legal.

Why Is Cocaine Schedule II?

Schedule II substances have accepted medical uses in the United States but also a high potential for misuse and severe psychological or physical dependence. Cocaine’s limited medical role and high misuse potential place it in this category.

Can Cocaine Be Addictive?

Yes. Cocaine has strong addictive potential. Repeated exposure can produce tolerance, craving and a pattern of compulsive use despite harm.

Cocaine use disorder may involve spending increasing amounts of time obtaining cocaine, repeatedly using more than intended, failing to stop despite trying, continuing despite medical or relationship problems and giving up important activities.

See Cocaine Addiction for the full treatment and diagnosis guide.

What Is Cocaine Withdrawal Like?

Cocaine withdrawal often begins with a crash marked by exhaustion, sleep changes, low mood and craving. SAMHSA notes that withdrawal can also include anxiety, irritability, increased appetite, anhedonia, concentration problems and vivid drug-related dreams.

For some people, depressed mood becomes severe enough to create suicidal thoughts. That makes mental-health monitoring an important part of cocaine withdrawal even though the syndrome usually does not produce the same type of dangerous autonomic instability seen in severe alcohol or benzodiazepine withdrawal.

Can Cocaine Cause an Overdose?

Yes. Cocaine overdose can involve extreme cardiovascular and neurologic stimulation. Possible complications include dangerously high blood pressure, arrhythmia, heart attack, stroke, seizure, hyperthermia, severe agitation and death.

Final CDC/NCHS data show that 21,945 U.S. drug overdose deaths involved cocaine in 2024. Drug categories can overlap, so many of these deaths involved other substances as well.

See Cocaine Overdose for signs and emergency response.

Cocaine and Fentanyl

CDC warns that illegally made fentanyl can be mixed into cocaine and other powdered drugs. The person may not know an opioid is present.

That changes the overdose picture. A person can show stimulant toxicity, opioid respiratory depression or both. Naloxone should be given when opioid exposure is possible because it can reverse fentanyl even though it does not reverse cocaine.

Cocaine and Alcohol

Using cocaine and alcohol together creates a separate active metabolite called cocaethylene. Human studies and recent systematic reviews associate the combination with additional cardiovascular risk compared with cocaine alone.

See Cocaine and Alcohol for a detailed explanation of cocaethylene and cardiovascular risk.

What Does Cocaine Look Like?

DEA describes cocaine hydrochloride as a white crystalline powder and crack cocaine as small irregularly shaped white rocks. Street cocaine can vary in appearance because of processing, moisture, adulterants and contamination.

Appearance cannot establish purity. A powder that looks white and crystalline can still contain unexpected substances, including fentanyl.

See What Color Is Pure Cocaine? for the safety-focused identification guide.

How Is Cocaine Addiction Treated?

There is currently no FDA-approved medication specifically for cocaine use disorder. That does not mean treatment is ineffective.

SAMHSA identifies contingency management as the behavioral intervention with the strongest evidence for stimulant use disorder. Other supported approaches include cognitive behavioral therapy, community reinforcement and motivational interviewing, particularly when combined thoughtfully with contingency management.

Treatment may also need to address depression, anxiety, trauma, cardiovascular disease, alcohol use, opioid exposure, housing and other practical needs.

When to Seek Emergency Care

Emergency evaluation is appropriate for chest pain, seizure, severe headache, stroke symptoms, collapse, extreme agitation, dangerous overheating, severe confusion, hallucinations with unsafe behavior, suicidal thoughts or abnormal breathing.

If the person is difficult to wake or breathing slowly, give naloxone if available because fentanyl or another opioid may be involved.

Finding Treatment for Cocaine Use

A person does not need to wait for a medical crisis before seeking treatment. Repeated binges, strong cravings, inability to stop, spending money needed for other obligations, escalating use or continuing despite health problems are all reasons for assessment.

Rehabs.Today provides directories for detox centers, residential treatment programs, and dual-diagnosis treatment.

Frequently Asked Questions About Cocaine

Is cocaine a stimulant?

Yes. Cocaine is a powerful central nervous system stimulant.

Is cocaine an opioid?

No. Cocaine is not an opioid, although cocaine can be contaminated with or used alongside fentanyl and other opioids.

Is cocaine Schedule II?

Yes. Cocaine has limited accepted medical use and a high potential for misuse, so it is federally classified as Schedule II.

Can cocaine cause a heart attack?

Yes. Cocaine can cause myocardial infarction, dangerous arrhythmias and sudden cardiac arrest.

Can cocaine cause withdrawal?

Yes. Withdrawal commonly includes fatigue, depressed mood, sleep changes, increased appetite, anxiety, irritability and craving.

Is there a medication for cocaine addiction?

There is currently no FDA-approved medication specifically for cocaine use disorder. Behavioral treatments, especially contingency management, have evidence of effectiveness.

Sources

• U.S. Drug Enforcement Administration: Cocaine Drug Fact Sheet: current federal drug description, forms, adverse effects and controlled-substance information.
• SAMHSA TIP 33: Treatment for Stimulant Use Disorders, Updated 2021: cocaine effects, withdrawal, medical complications and evidence-based treatment.
• CDC: Stimulants and Overdose Prevention: current stimulant-overdose risks and U.S. cocaine-overdose context.
• CDC/NCHS: Drug Overdose Deaths in the United States, 2023-2024: final 2024 national cocaine-involved overdose mortality data.
• SAMHSA: Treatment of Stimulant Use Disorders: evidence-based treatment guidance for cocaine and other stimulant use disorders.