I woke up in the middle of the night to use the restroom and as soon as I sat up I became dizzy, I made it to the restroom and while seated I began to sweat profusely - literally dripping off of me. I got up two more times over the next 2 - 3 hours and the dizziness remained and I became nauseated. Until my stomach was completely empty, I had three spells of nausea and dry heaves. It is now late afternoon and am still a bit lightheaded, and I have had fluids and small amount of cereal. gradually feeling better, but lightheaded. I had two other spells in the past 3 months wear I have felt dizzy and began to sweat severely, but they had passed with several minutes. I do take medication for enlarged prostate and for mild hypertension.