Crack Cocaine

Crack cocaine is cocaine that has been chemically converted from powder (cocaine hydrochloride) into a freebase form that can be smoked, produced as small, hard 'rocks' that make a crackling sound when heated — the source of the name. It is not a different drug from cocaine; the active compound is the same. What differs is the route: smoking crack, versus snorting powder cocaine, changes how fast and how intensely the drug acts, which is why crack developed a reputation for being especially addictive. For the full pharmacology, effects, and general risks of cocaine, see the cocaine page; this page focuses on what is specific to the crack form.

Crack acts through the same mechanism as powder cocaine — it blocks the reuptake of dopamine (and norepinephrine and serotonin), flooding the brain's reward circuitry (see the cocaine page for detail). The key difference is pharmacokinetic, not pharmacological: smoking delivers the drug to the brain within seconds via the lungs, producing a near-immediate, intense but short-lived rush, followed by a rapid crash. This fast onset and short duration drive a compulsive, repeat-dosing pattern that underlies crack's high addiction potential.

The subjective effects are those of cocaine — euphoria, energy, alertness, confidence — but compressed and intensified by the smoking route: a rapid, powerful high lasting only minutes, followed by a sharp crash with craving, irritability, and low mood that pushes toward redosing. See the cocaine page for the full effect profile; what is specific to crack is the speed of onset, the brevity of the high, and the intensity of the crash-and-crave cycle.

Crack carries all of cocaine's risks — cardiovascular strain (heart attack, stroke, dangerous rhythms), overheating, seizures, and the danger of fentanyl contamination in the illicit supply (see the cocaine page) — plus harms specific to smoking it. Inhaling hot crack vapor damages the lungs: respiratory problems collectively called 'crack lung' (cough, chest pain, breathing difficulty, and acute lung injury) are well documented, and sharing pipes can transmit infections. The extremely fast, short high makes crack especially addictive, driving intense compulsive use and rapid escalation. The repeated crash-and-crave cycle contributes to binges that heighten the cardiovascular and psychological risks, including paranoia and stimulant psychosis. As with any illicit drug, crack cannot be assumed pure — cocaine and crack in the illicit market have been found adulterated, including with fentanyl, which can cause fatal overdose. If someone has chest pain, a very high temperature, seizures, trouble breathing, or collapses, call 911 immediately; naloxone should be given if an opioid such as fentanyl may be involved. This page has not yet been medically reviewed.