Children taking cough medicine old urinary frequency, consider is caused by drinking too much water; if the symptoms are more serious and frequent, should be vigilant is caused by urinary tract infection and other pathological factors. 1. Drinking too much water: If you drink too much water at one time when taking medication, it may increase excretion, resulting in frequent urination, which is a normal phenomenon, without special treatment. 2. urinary tract infection: children coughing with infected bacteria, viruses, not timely treatment may enter the body through the respiratory tract, serious blood circulation affects the urethra, thus causing urethritis, cystitis, etc., may appear frequent urination, urinary urgency and other symptoms. Children taking cough medicine old frequent urination, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.