Cocaine, because it is water-soluble, travels through the body rather quickly. The general rule of thumb is 1 to 7 days, depending upon the size and metabolism of the person. It can also be affected by how much cocaine was ingested over what time period. As far as passing a drug test is concerned, there is no guaranteed right amount of time either. It would depend largely upon the above-mentioned variable and the type and sophistication of the test. Cocaine could be detected in the hair follicles, for example, for as long as the hair had been growing.
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