Cocaine

Characteristics and common forms

Chemically, cocaine acts on pathways in the brain that regulate dopamine, norepinephrine and serotonin. It is commonly snorted, injected after dissolution, or smoked when converted to a freebase. Different routes of administration alter the onset and intensity of effects, with smoking and injection producing very rapid but shorter‑lived highs. The refined powder is separated from the raw coca leaves through chemical extraction and purification processes.

History and medical uses

Indigenous peoples in parts of South America chewed coca leaves for their mild stimulant and appetite‑suppressing properties. In the 19th century, chemists isolated the active alkaloid and researchers explored its local numbing effects. Today, the compound still has limited legitimate medical applications: it can function as a topical local anesthetic and vasoconstrictor in specific clinical procedures. Historically it was used more widely before safer synthetic anesthetics were developed.

Effects, harms and dependence

Short‑term effects include wakefulness, elevated mood, reduced need for sleep, increased heart rate and blood pressure, and narrowed blood vessels. These arise from stimulation of the nervous system but may also cause anxiety, paranoia, or violent behavior in some users. Repeated use often leads to tolerance and compulsive use: cocaine is well recognized as highly addictive for many people.

• Cardiovascular risks: heart attack, stroke and arrhythmias.
• Respiratory and nasal damage from smoking or snorting.
• Mental health effects: mood disorders, psychosis and cognitive decline.
• Infectious risks when injected.

Legal status and social impact

In most countries, nonmedical possession, distribution and manufacture of cocaine are illegal and subject to criminal penalties. Its illicit trade has broad social and economic consequences, including violence associated with trafficking, public health burdens from addiction, and legal systems responding to supply and demand.

Treatment for cocaine dependence includes behavioral therapies, counseling and support groups; no single medication is universally accepted to reverse addiction. Distinct from chewing whole coca leaves in traditional contexts, modern refined cocaine produces much stronger, faster effects and a higher risk profile. When used topically in clinical settings it may be applied to the skin or mucous membranes, for example on the skin or gums, but such uses are controlled and rare compared with recreational use.