Why would a woman be prescribed flomax (tamsulosin) after having kidney stones?

Sm. muscle relaxer: 'flomax' (tamsulosin) is an Alpha 1a blocker that relaxes smooth muscle around the prostate to aid in urination in men with 'enlarged prostate' (bph). It is also used to 'relax the ureter' in aiding the passage of a small (<5mm) kidney stone. Kidney stones may occur in women, too, so it not unheard of to put a woman on tamsulosin.

Expulsive therapy: Pts with small stones show increased rates of stone passage on flomax (tamsulosin)...Helps ureter push out stone.