Our expert says:
Cyberdoc is the right expert for this one. 7 years is a long time, so the antifreeze will be long gone, but the aftereffects of any damage it caused could linger. I don't know if it can cause kidney stones or if this is a coincidence. As I also get kidney stones, possibly the most painful condition known to man or beast, your friend has my sympathy. There are a range of blood and urine tests which can be done to check whether there is lasting kidney damage, for instance ; better seeing a consultant physician ( a specialist in general medicine ) than a GP.
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