I have had this happen twice, all of a sudden I get extremely dizzy, then I get very nausauated and. My whole body starts sweating. Today I threw up and had diarrhea at the same time. I hàd to go lay down both times, today it lasted longer. I have had a triple bypass, and stints put in three times in a year. The triple bypass and first stints failed. Not sure if what is happening is from the heart or blood pressure. My doctor recently increased my metroprol and lisinipril. Also I have had allergies now for 2 months and my ears are all plugged up, could this all be related?