My lower abdomen is very tight, I am feeling like knife cutting. I have completed OZ (a kind of antibiotic ) and are being taken two tablets in day Normaxin RT, velgut and nexito plus for three years. Previously, just one week ago, I was on pantocid simple for the several months, often taking pan-D. OZ is frequently taken by me. but my lower abdomen problem for tightness is not solved. I have colonoscopy in 2004 and barium anema also as well as upper endsocpy in 2003 but nothing is there. Please advice me a appripriate medication to ease the problem. I feel great deal of discomfort and distress due to bloating and distension. Thankyou