That's just a myth. It lowers the ph of urine though. It could reduce the detaction time period amphetamines. It's not really worth it though but if u choose to drink it in shots. gives u diarrhea. But water will dilute the drug metalites in your urine temporarily so drink about 7 or 8 cups of water a few minutes before the test. Eat a vitamin B so it turns your urine back yellow or they may become a little suspicous of it being too clear. Oh yeah, eat big