RecruitingPhase 4Drug trialEffect of Empagliflozin in Patients With eGFR Between 10 and 20 ml/Min/1.73m2The proximal tubule remains the main site for sodium reabsorption in patients with advanced renal failure. The investigators therefore hypothesize that SGLT2i should still exert a significant natriuretic effect in patients with eGFR below 20 ml/min/1.73m2, and therefore should still decrease proteinuria with a potential renal protective effect.