I found this website that you might find very informative. Not associated with them, nor a customer, etc. but there is some decent stuff here.
https://www.lhsc.on.ca/regional-renal-program/over-the-counter-medications-and-chronic-kidney-disease
To be sure, ask your doctor.
Ginger

I contacted my PCP today and am waiting to hear back about the safety of taking a laxative in the short term, and then starting Miralax on a daily basis. Waiting to hear back from them. I run low on K+ so right now high K+ fruits and vegetables are not a concern. I drink quite a bit of water. One of my problems is inactivity. I have severe fear of getting COVID, despite being vaccinated. I have become very deconditioned and although I am am Physical therapy, it's very slow going. Thank you for the good suggestions.