How long will methamphetamines show up on a drug test?

3-4 days in urine It does not stay in your system longer if you shoot up actually it will get out of your system faster that is why they test your urine instead of blood. I have heard that drinking a whole lot of cranberry juice and water will clean out the bladder. I know for sure that sure gel and 2 gallons of water will clean out anything. When your pee turns clear your on the right track.