Will drinking plenty of river affect the result of opiates within the urine?

Will drinking plenty of river affect the result of opiates within the urine?
I don't know about opiates but it will dilute other compounds present within urine so the lab will know you drank plenty of water
It won't concern. One of the things they test within your urine is the specific gravity, which tells them how dilute the urine is.
If you're positive, it's gonna show up.
Sorry.
no