Yes I did. Had been being a bad girl. Not using my O2 at night. Not staying hydrated. I was tippling some. Okay, quite a bit! Stood up and down I went. . I have no memory of the ambulance coming or being in the hospital here. I was transferred by ambulance an Army Medical Center Hospital 3 hrs. away as the break in my left arm close to the socket (in 4 places) required surgery. They did not operate right away because they had to get my O2 sats and BP up. Some people do have what is called orthostatic hypotension, meaning their BP drops when they stand up. So taking it slow and allowing your body to adjust is key.

Yes I have I was told make sure to eat lots of protein food and drink lots of water and it really does make a differents

I get close to fainting with exertion, sometimes have to stop for a while and calm down. Take it slow drop down a gear and conserve yourself. Works for me

Cheers. Had check up, no concussion, think it was just getting up too quickly. I'm being extra careful now.

I almost passed out in line at the grocery store. Went down to my knees before someone helped me to a bench. I had left my oxygen in my truck, as I was not using it 24/7 at that time. Realized that my oxygen level fell so low that I began to blackout. Needless to say that was my last trip without oxygen.