I had loose motions (2-3 times a day, less in quantity) 7 days ago, then took metrogyl for 2 days. Whenever I ate something I felt heavy and light pain in stomach, feeling as of gas. Then after doctor consultation I had following medicines: ofloxacin 200 mg ornidazole 500 mg tablet, omeprazole and lactic bacillus tabs. All were twice a day for 3 days who's dose got completed on 2nd april morning (my 6th day). Still in evening had loose stool greenish in colour. What can be the possible cause for it?