Nephrol Dial Transplant (1996) 11: 457-460
© 1996 European Renal Association-European Dialysis and Transplant Association
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Renal function on and off lithium in patients treated with lithium for 15 years or more. A controlled, prospective lithium-withdrawal study
1Department of Psychiatry, University Hospital Lund 2Department of Psychiatry, University Hospital Linköping 3Department of Nephrology, University of Göteborg Göteborg, Sweden
Correspondence and offprint requests to: Correspondence and offprint requests to: Professor Mattias Aurell, Department of Nephrology, Sahlgrenska sjukhuset, S-413 45 Göteborg, Sweden
BACKGROUND.: Controversy remains over the magnitude and reversibility of reduced renal function in long-term lithium patients.
METHOD.: Thirteen patients with 18 years (range 15–24) on lithium discontinued the treatment, and were re-examined twice after 5 and 9 weeks (4–16) off lithium. They were compared to a non-lithium psychiatric control group, matched for age and sex.
RESULTS.: Glomerular filtration rate (GFR) tended to improve from 69 (39–96) to 74 (39–94) ml/min/1.73 m2 BSA, P=0.057, which was not significantly different from 78 (61–106 ml/min per 1.73 m2 BSA in the controls. Reduced GFR was found in only two of the lithium patients off lithium, and in none of the controls. Maximal urinary concentrating capacity did not improve at all. It was 637 (130–875) mOsm/kg H2O in the lithium patients, which was lower than 856 (705–1.035) mOsm/kg H2O (P<0.01) in the controls. Two of the lithium patients had isosthenuria.
CONCLUSIONS.: Lithium patients often have an irreversible, clinically important reduction of Umax, sometimes progressing to nephrogenic diabetes insipidus, while GFR is well preserved in most patients.
Keywords: affective disorder; controlled study; hypercalcaemia; kidney function; lithium treatment; concentrating capacity; diabetes insipidus
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