A 88-year-old patient is passing stools unconsciously for past 2 days. He had h/o TIA on December 2014, treated in a private hospital [details not available], on Tab.Aten 25 mg which was stopped 6 months before due to hypotension. Now he has also c/o cough.

On examination he is not pale/icteric, not dehydrated, b/l pitting pedal edema+, pulse 98/min, BP 120/80 mm hg, CVS- no murmur, RS- no added sounds, P/A- no tenderness/mass, CNS- no focal neurological deficit. How to proceed?