Hello Dr, Here are the details: Current status - I am having a acute pain in my right abdomen. I am unable to guess if i have a blood in my stool, it is dark brown/tarry. I had undergone Ultra Sonography test of my whole abdomen, but reports were normal. I showed it to my nearest doctor and he has prescribed me Ciplox TZ, Rifagut 400 & Zentel 400 History - I was occasional drinker and regular smoker, and have quit.