I am a 'youthful' 69 year old and have suffered with very regular UTIs all my life. I recently took a 10 day course of antibiotics (this finished 5 days ago) and then began taking Hiprex. I now feel that a UTI is developing once again. Does it take time for Hiprex to work? Please can anyone help? ## It can take time for any medication to work and reach its full efficacy in your body, it may take as long as 4 to 6 weeks, in some cases. Learn more Hiprex details here. What type of symptoms are you having?