Twice today have had a sudden feeling of impending blackout or loss of consciousness, with head pain, but it only lasted about 2 or 3 seconds, then the feeling of possibly going to pass out goes away. Both times, I was sitting down and basically inactive. It s not the same sensation as right before you faint, since there is actual head pain involved. I have checked my blood pressure, but it s normal. I take blood pressure medication and have had symptoms of high blood pressure side effects (headache, slight dizziness, nausea, etc.) the past few days but pressure is normal for the last 2 days. Prior to that, about 3 days ago, it was actually low, (111/58) which is really rare for me. I take Lisinapril, Metoprolol and Amlodopine Besylate.