I can't seem to catch my blood pressure when it does this but I'm pretty sure that's what it is. Either drops or spikes in bp causing the world to spin and make me lightheaded and feel like I'm about the faint. I was 102/75 with pulse 83. Doesn't sound too bad as my bp is usually low from taking Tenormin for my heart (PVCs and tachycardia). I know I've mentioned the symptoms before in a couple of threads but I'm wondering now what would be causing it. My meds are all listed in my sig along with my medical conditions. Could any of the meds be causing it? I take them all at night before bed. I'm just sick of not knowing what's wrong with me. Even right now I can't tell if I'm gonna pass out eventually or if I'm having a panic attack.