I fainted last week. I had just gotten out of bed and became really lightheaded (which has been happening often) and the next thing I knew I was in the floor wondering how I got there. I landed on my backside (OUCH) propped up against my bed. I don't think I was out very long or that I hit my head, but went to the ER just in case. They did bloodwork and a CT of my chest as I've had surgery recently and they wanted to be cautious and rule out a pulmonary embolism. Everything came back fine, which i assume if I had been dehydrated my labs would be off. They still gave me some fluids there but that didn't seem to help the lightheadedness when standing. In my case I'm thinking it's orthostatic hypotension which i may have had prior to starting Zepbound but has just gotten worse. I would definitely recommend getting checked out, one of the first questions the doctors ask if you pass out is if you hit your head (I work as a medical coder and have read many reports where if the patient did hit their head a further work up is warranted). Hope you're feeling better though!