Loretta , Thank you for that useful information ! I have episodes of what I call extreme drowsiness that come out of no where . I wonder if they could be BP related ?I have never passed out with it but just have a pressure type feelling & cannot stay awake. And as for the sleep apnea I too wake gasping for air at times . However when I went in for sleep study , I could not sleep LOL so they could not complete study .