How are you? Tamsulosin belongs to a class of medications called alpha blockers which works by relaxing the muscles in the prostate and bladder so that urine can flow easily. It is usually indicated for the treatment of an enlarged prostate. It an also be given in managing kidney stones in men and not as effective in women. It is best that you have your kidney stones checked by your doctor for proper management. Drinking plenty of fluids may also help. Take care and do keep us posted.