I don't know about mentioning brand names on here, but Swanson has the niruri variety. I took a lot of it with no allergy or other symptoms for quite awhile.This has been over 4 yrs. ago. I didn't pass any stones, but noticed cloudy urine the 1st few times I took it. I assumed it was clearing my kidneys & that's what that was. I eventually used up all but one bottle of that great sale order & MOL forgot about it.
BTW, I got Hep B in 1980 & nearly died, then was hospitalized & dosed (not long after an old naturopath saved my life from that & about 4 other concurrent illnesses) by a traditional doctor for bronchitis with an IV antibiotic I TOLD him specifically not to use because it's contraindicated for liver patients. That pretty much finished off my liver. I recently began experiencing bloating of then pain & shrinkage of what has to be my liver. I also have MG & now have CHF & HBP which is killing my kidneys. I am about to scrape up the funds to buy another batch of the niruri & save myself this time.
I used potassium citrate for one of my little dogs with kidney stones & damage from the Sam's melanine contaminated/fortified dog cookies that killed so many pets in the mid 2000s, but I read it can cause potassium problems if not used carefully. Hope this helps someone.