I am looking for supplements to prevent urethra spasms . . . I do not know if I have herpes but just went thru 7 days of hell have a DR injecting numbing stuff inside. I have always struggled with uti s but since taking D-Mannose and Cranberry every day I haven t had one in 9 months until two weeks ago. The first time I have the spasms is lasted 3 days and only required one dilation this time it took over 7 days and 3 dialations. I am looking for preventative options . . . I don t want that to happen again.