no patients could be recruited

Patients treated with the antiepileptic drug Oxcarbazepine often develop syndrome of inappropriate secretion of antidiuretic hormone(SIADH)We 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

The purpose of the study is to determine the amount of Aquaporine2(AQP2)in the urine in patients treated with the antiepileptic drug Oxcarbazepine before and after the administration of fluid restriction

Inclusion Criteria:

Age more than 18 years, both men and women, patients with epilepsia treated with Oxcarbazepine, and a Sodium content in plasma lower than 130 mmol/liter

Exclusion Criteria:

severe diseases in the heart, lungs or liver;diabetes mellitus, other not-well treated diseases in endocrine organs, cancer; unwillingness to participate