I was not familiar with this product, but I looked it up on the web and it appears to be a urinary tract anesthetic, which might make you feel better temporarily, but will not dissolve your stone. Most stones are NOT dissolvable. Most small (5mm is small) NON OBSTRUCTING stones are asymptomatic. I would want to check that your urine CULTURES are truly showing an infection.
July 2011 I had severe pain in left kidney and scanned it USG result in 4.9 mm stone in left kidney.Doctor gave me medicines and a diet chart which is seriously followed by me.Yesterday March 2013 again I had a pain in left and USG showing 4.9 mm stone in Left upper ureteric Calculus.Is surgery is last option available ??? Can medicine help me to pass it through......
US is not a super accurate way to measure the size of a stone, so I would probably have you get a simple abdominal X-ray. If the stone is truly 4.9mm, it is passable without surgery, and the most effective medication to help it along is called tamsulosin (Flomax).
A related discussion, kidney stones and heart attack