The onset of cocaine's euphoric effects is fastest with inhalation, beginning after 3–5 seconds. This gives the briefest euphoria (5–15 minutes). Cocaine is smoked by inhaling the vapor produced when crack cocaine is heated to the point of sublimation. In a 2000 Brookhaven National Laboratory medical department study, based on self-reports of 32 people who used cocaine who participated in the study, "peak high" was found at a mean of 1.4 ± 0.5 minutes. Pyrolysis products of cocaine that occur only when heated/smoked have been shown to change the effect profile, i.e. anhydroecgonine methyl ester, when co-administered with cocaine, increases the dopamine in CPu and NAc brain regions, and has M1 — and M3 — receptor affinity.
The onset of cocaine's euphoric effects is fastest with inhalation, beginning after 3–5 seconds. This gives the briefest euphoria (5–15 minutes). Cocaine is smoked by inhaling the vapor produced when crack cocaine is heated to the point of sublimation In a 2000 Brookhaven National Laboratory medical department study, based on self-reports of 32 people who used cocaine who participated in the study, "peak high" was found at a mean of 1.4 ± 0.5 minutes. Pyrolysis products of cocaine that occur only when heated/smoked have been shown to change the effect profile, i.e. anhydroecgonine methyl ester, when co-administered with cocaine, increases the dopamine in CPu and NAc brain regions, and has M1 — and M3 — receptor affinity.