For the last four months I ve been suffering from a constant dry cough, it gets worse at night when I m trying to sleep. Recently I went to see a doctor. He told me to start taking Zantac for two months, and said it s probably Gerd. I ve started taking the Zantac and am noticing a decrease in my coughing. However, I still have a nagging worry in the back of my mind, I heard that lung cancer can cause the same kind of cough I ve been having, and that some people have been misdiagnosed as having Gerd. Since the Zantac seems to be helping with my cough, should I still be worried about it being cancer? And is so, what type of screening would be the best? Thanks, Gerald