Did it take a while to pass the stone on this med? My sister is diabetic and thinks she may have a stone, her dr. put her on this med, but she is still in pain now. Any tips or exp... moreDid it take a while to pass the stone on this med? My sister is diabetic and thinks she may have a stone, her dr. put her on this med, but she is still in pain now. Any tips or experiences welcome..