Candrinking water for three days help clean out your system of cocaine?

The only thing that will remove the drug from your system is time. After approximately 2 - 5 days the remaining amount in blood or urine is generally not sufficient to make you fail a test. Heavy users may take much longer to clear the system out. A test using hair will typically show positive for about 90 days.

There is no magic pill, ointment, bath, salts, or vitamin that will eliminate the drug from your body. People often claim that massive doses of niacin will do the job but that will not work and will cause its own side effects. (The overdoses of niacin are a Scientology treatment regimen with no scientific evidence).