3 to 5 days.
2 days
This answer is from the UK's BUPA Drug testing website. COC - Cocaine derived from the leaves of the coca plant, is a potent central nervous system stimulant and a local anesthetic. Cocaine induces...
Cocaine has a halflife of around 1 hour. That means every hour after taking cocaine the level of cocaine drops by 50 percent.
Nils Gilman on the Demand and Supply Economics of Cocaine
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