how long does a little cocain stay in your blood for
Small part of a cocaine dose may stay in the system and be detected in blood for 48 hours after use. Many users may develop cocaine tolerance, and the changes in cocaine concentrations in storage are also crucial for blood testing.ello Rollin. It can generally take about 2-4 days for cocaine to leave the system. However, long term use can be detected for 7-10 days or even a couple of weeks after last use.