my huband just had surgwry for blader tumor, a night later could not urinate, went to hospital and catheter inserted, dr put him om tamsulosin hcl 0.4 mg, he as low blood pressure, after taking it the next night the following morning he was so week and dizzy that he couln t get out of bed, he stopped taking it. is there anything else that he could take that does not lower blood pressure and by not taking this med, when he gets the catheter removed, will he again have problems urinating also is there something else he can take that won tveffect blood pressure