Well... im not a doctor, but there are somethings i know.
The THC is not a poison, nor its harmful to the body in any way, so there is not need to worry about it passing through your kidneys.
The only problem it would cause is that it alters the levels of water in the body... the cottonmouth is the most obvious effect of this. And low levels of water in the body can help the growing of kidney stones (dont know if its this your problem). But if you drink plenty of water, it should not be a problem.
Also, doctors usually exaggerates the told dangers of smoking (unless they were pro-MMJ), so if even they were not worried about it, you really shouldnt worry.
Coelho Reviewed by Coelho on . Does weed effect the kidneys? Hey, i have a kidney disease and i still smoke weed. I smoked before it and with it. Ive told my doctors (because they asked me) and they didnt seem to be worried about it but i have heard it can screw with my kedneys because the thc in the blood stream. and for anyone who doesnt know, the kidneys filter the blood among many other things. i worry becuase there are foods and things a cant have because the stress it puts on my kidneys becuase of the lack of function. dont expect anyone to know, Rating: 5