How effective is water at clearing out your system of amphetamines?

[Trumpus_Wumpus]

Yesterday, I took two 50mg pills of Vyvanse, and there's a likely possibility that I could be subject to a urine drug test tomorrow. By the time it happens (if it happens) it will be a little bit more than 1 day and 12 hours since the Vyvanse wore off. I'm aware Vyvanse usually takes 2-3 days to clear out, but I've been drunk around 6 cups of water yesterday, and 12 cups today. Will this have cleared out my system enough to pass a possible test? If not, what else should I do?

 

[CFC]

Generally speaking, water won't make any difference. You'd need to acidify your urine (eg megadoses of vitamin C) to draw out base compounds like amphetamine. We don't do drug test evasion questions though I'm afraid, and I'll have to close this thread.