Hi, The blood pressure and kidney disease are raceprocative to each other. Blood pressure is a major risk factor to damage the kidney if it is uncontrolled for long time. Simultaneously if any one developed kidney disease then his blood pressure gradually rises. In kidney disease, there are several factors those cause drowsiness. Most common is Uremia means high Blood urea level. Another one is Metabolic acidosis means increase acid production in body due to disturb metabolism. Third one is high blood pressure called hypertensive encephalopathy. 4th factor is sepsis means some infection in body. so in your case, you have to investigate properly to find out the exact cause of drowsiness. And then treatment according to cause. So you just get CBC, KFT, Urine Routine and ABG in first spell. Then next tests will be decided according to report. So don t wait and get hurry to do all because drowsiness is a important and high risk symptom in kidney disease. Thank you