I took prescription under name of guaifen pse er tablets on 5/24/04 28 tablets-Itook 14 7 days one every 12 hrs 120 mg. I was being treaded for a dry cough-after a day or two - I was urinating every 2 to 3 hrs instead of 4 to 6hrs my usual. Also it was very dificult to do so-I thought this was my prostate going real bad-as I had only been diagnosed as having a mildly enlarged Prostate-After I stopped taking all became nornal again-incidentally it was mixed w/Guaifenesin