I have been on Lithium for bipolar disorder for over 20 years. From a blood test two years ago, I noticed that my GFR was below 40. So, I gradually started switching from Lithium to Epilim to avoid further damage to my kidneys. But now, I experience excessive thirst and I wake up at night to pee and drink more. I have transparent urine with bubbles, and I also feel quite tired. I would like to know what are your suggestions for these issues. Please find attached my blood and urine results chronologically ordered from the last two years. At the end of this month, I will do a kidney scan but, I have not seen a nephrologist until now.