Lemonade is an effective way for kidney-stone-prone people to slow the development of new stones, according to a study conducted at the University of Wisconsin. Researchers found lemon juice increases the amount of citrate in the urine to levels known to inhibit kidney stones. While it doesn't work as well as potassium citrate usually prescribed by doctors, lemonade therapy provides an attractive alternative for patients who want to avoid yet another medication.
As Reported by CBS News

My remarks:
for the treatment of common kidney stones there are various options.
tamarindi [ tamarinde ] syrup can be a very effective and nice drink to use regularly.
magnesium/vitB6 can be very appropriate as well, to use regularly[consult your doctor]
sleeping always on the same side,can increase the change of kidney stones.[ so turn to the other side if you wake up in the middle of the night]
an attack of kidney stones may be treated very well also by acupuncture in my experience.
stones of uric acid may need a different diagnostic and therapeutic approach.