Documentation of the efficacy and safety of desmopressin (Nocturin®) 0.1 mg tablet. Observation of patients with benign prostate syndrome, in whom nocturia associated with nocturnal polyuria is treated with desmopressin (Nocturin®) 0.1 mg tablet focusing on number of nocturnal voids, ratio of night/24-h urine volume (%), duration of first undisturbed sleep period and quality of life.