19 patients with chronic urinary tract infections were treated, after culture and sensitivity testing, with cephalexin (Ceporexine) 1 g twice daily for 10 days. All patients were free from bacteria after 2 days treatment and 18 after the treatment was finished. After 30 days, 7 had a recurrence of the urinary tract infection. The result shows that cephalexin given twice a day in the dosage of 1 g has as good an effect in the treatment of urinary tract infections as when the dosage is given 4 times a day.