a friend was recently diagnosed with Meniere s disease. He is trying to handle it with diet-- watching sodium intake and drinking lots of water. Most days he is fine, but occasionally has an episode that begins with dizzyness, nausea, sometimes fainting, and today he passed out and slept for 2+ hours and upon waking had no memory of the day up till then. Am concerned that it might be more than Meniere s. He did have a brain scan when the disease was first diagnosed and it was clear. Sometimes these episodes happen out of the blue and he just faints. Other times, like today, he had a difficult time sleeping last night and felt weird upon awakening. He began vomiting around noon and has done so all afternoon.