I am having a gastric problem had a endoscopy doctor gave me tab duzellam20 dvn ibs happy it rifagut 550 mg currently I am taking these medicine know also from past 6 months I am having acid reflux abdominal pain gas bloating and full day feeling sleepy what has happen to me no idea I am fed up please help me and I also have a habit of smoking cigarettes 10 per day with tea what to do please help.