My doc prescribed flomax for a kidney stone but I first wanted to see if it would pass without the use of this drug. It's been almost 3 weeks and I have still not passed it. The ultrasound that I had yesterday shows it being over a cm in size. I have to get it surgically removed next week but before that I was wondering if I should start taking the flomax till then with the chance of it passing on its own or is it impossible to pass a stone of that size without surgical intervention? The stone is situated close to the bladder. I am a 55 yr old female with a history of stones.