<qa>  What is the name of the treatment that patients are treated with?Patients treated with the antiepileptic drug Oxcarbazepine often develop syndrome of inappropriate secretion of antidiuretic hormoneSIADHWe want to test the hypothesis, that these patients have a higher reabsorption of water during the Aquaporine2 water channels,a higher concentration of Vasopressine AVP, and a lower clearance of water.This situation will tend to normalize, when the patients are treated with fluid restriction 