I now have the same dilemma. When I had a recent CT scan it was confirmed that I am allergic to the contrast dye, which stopped my kidneys functioning. They gradually recovered, but I have high creatinine levels which the specialist is worried about, I used to be on Raminpril before this episode, but I have now been put on a different BP med (Entresto). Too early to say if it helps or hinders, but I am being urged to go back onto Eatwell and I have had my Metformin stopped, and my Gliclazide halved. To make matters worse I am on a water tablet and Dapagliflozin to make me wee for England, which is flushing out the sodium from my blood.
Doing some research into this I found too that high protein is a problem, as is alcohol intake, and salt in food. So I can no longer add salt to my food to counteract the sodium, and I need all the other meds to try to control my diabetes, and I am not allowed any supplements either. When I was in hospital recently on Eatwell, my daily average bgl rose from around 6 to 12 and rising. Since coming out I have managed to get it down to 7 again, but this creatinine worry is urging me to go back to Eatwell.
My plan of action is to change my diet slightly by reducing red meat, in favour of white meat and fish. I will reduce my alcohol in favour of adding salt, and I will halve my water tablets.
I will let you know if this provides any respite.
They want to give me an angiogram, and another CT scan with more contrast dye in the near future, so this gives extra urgency.
Edit to add: the other culprit I discovered was dehydration, so my water tablets and Dapaglifozin are not helping me there either. So alcohol is a no-no and hello gallons of water. Constipation from Eatwell and hospital food means cutting back on the laxatives and hoping for fair winds to follow,