Minor stuff was an upset stomach and a headache, which could just be products of my esophagitis. The weird part, though, was the second day, when I starting to feel better. I lost hearing in my left ear three times that day (once in the morning, afternoon, and evening). I couldn't hear anything in my left ear for a few moments except a really loud ringing. Then sound would just kinda fade back in. So, I'm worried about my ear more than anything else, in case there's something seriously wrong with it.