Over thirty years ago, I passed kidney stones twice about a year apart. Then I ran across Adell Davis’ Let’s Get Well (can still be found on Amazon.com) and it said there were many types of stones; but, the most common could be dissolved if the acidity of the urine were increased and this could be achieved if one took Magnesium Oxide (the best form of Mg for bodily absorption) and Vitamin B6. After that second stone, I could sense a presence (unpassed stones?) in the kidney. So I bought small bottles of magnesium oxide and B6 and experimented—the presence went away. When the bottles were empty and I did not purchase more, the presence came back. So I took these and other vitamins regularly for a long time. About ten years later money was tight and I did not buy vitamins—the stones came back. Again about 3 years ago I stopped taking vitamins and kidney stones came back. I also have noticed that I do not get leg cramps when I take Mg and B6.

A web site I found recently listed the types of stones as:
1-3. Dicalcium phosphate, Monocalcium phosphate, & Tri-calcium phosphate: Also causes common arthritis, hardening of arteries, and spurs. Eliminate or largely decrease phosphate-rich food such as meat, breads, cereals, pastas, and carbonated drinks. Increase fruit and vegetables and milk 2%, take magnesium oxide (300mg/day) and Vitamin B6 (250 mg/day). Drink a lot of water.
4. Oxalate: Common cause of lower back pain. Stones caused by oxalic acid in regular Orange Pekoe tea including iced tea (15.6 mg oxalic acid per tea bags). Also eliminate cocoa drinks and chocolate of all kinds
5. Uric acid: Also causes gout and arthritis. Meat produces urea and its by-products. It is also highly acid-forming which requires more calcium from living vegetable sources to neutralize these acids.
6. Cysteine: Sulfur containing.

You probably already have figured this next thought out: You said the Codeine masks (as to completely suppresses) the pain. I would never take something to completely override the pain because if a stone completely blocked the ureter, then the kidney could become damaged. The amount of pain signals if immediate surgery is needed. I have found that if the stone is moving (though seemingly at a glacial rate) one can follow its path (pain).

If you ever completely pass a stone (you’ll know when that happens), get it analyzed for composition.

Another web site I found recommends the phosphoric acid in colas. It may work but there is no real nutrition involved in this treatment.

As to a hot bath that LED mentioned to help with the discomfort of passing a stone: I usually use the shower instead—but the water bills skyrocket. When I pinched a nerve lately between my shoulder blades, I used a hot shower and also a heating pad—found an extra large one at Walmart.

So it is not what to take when one gets a stone (wherever you are located); but rather, getting good nutrition continually so the stone does not form in the first place.

To sidetrack this topic just a bit, I have found the site http://www.doctoryouself.com to be most useful and interesting. I am a 61-year-old graduate student in engineering. A while back, whenever I moved, it felt like I was moving through water—my limbs felt heavy. Further, my mind had the same heavy feeling and the dissertation research was not proceeding at a good rate. I remembered B12 was supposed to help the mind and it produced a day and night difference in my attitude in just a day or so. However, there was still some lingering depression. In searching the doctoryourself.com I found that niacin (B3) is good for many psychological disorders including depression. Further, it lowers blood pressure. Why treat a symptom with a counter symptom producing medicine (i.e., allopathic medicine) when the problem is a nutritional deficiency?—although the pharmasutical companies do not make money. This particular web site uses medical and nutritional research literature to document its statements. After taking nonflushing niacin I felt even better and there was a new spring in my step.

In searching out spinal stenosis (http://www.doctoryourself.com/stenosis.html ) for my advisor’s wife, I found it most interesting that Vitamin C can be used to mask the pain of those with terminal illness leaving at least their minds clear to the end (search on “One of the biggest surprises in analgesia occurred during the 1970's in Scotland at the Vale of Leven Hospital.”). And a person with incapacitating sciatica that the doctors said he had to learn to live with “grabbed the chain saw, and set to the task of cutting up a load of slab wood that I’d neglected for the last three months” after taking megadoses of Vitamine C for four days (search on “In 2004, I was disabled to the point of being unable to put on my own socks and underwear”).