I have been taking Lithium XR 400 mg twice a day and Valprol CR 300 mg twice a day for the last 19 years. I am also taking Geminor M1 once a day since the last two years. My local doctor checks regularly for my creatinine level and lithium level. My last report of creatinine was 1.36 mg/dL and lithium was 0.48 mmol/L. Now, my local doctor said it is too risky and reduced lithium dosage to 200 mg twice a day. I have no pressure or any other symptoms. But, I am worried what is going on.