you need to not smoke for atleast 72 hours to get a negative test.
drinking too much water will reduce the toxins in the bloods but will add on to the work of the kidneys.
i hope i have answered your query.
I find this answer helpful
You found this answer helpful
Disclaimer: These answers are for your information only and not intended to replace your relationship with your treating physician.
This is a short, free answer.
For a more detailed, immediate answer, try our premium service [Sample answer]