Hi I'm new here but just wanted to weigh in on the allergy epi-pen thing. I never had allergies (that I was aware of) before my POTS symptoms started. When I was undiagnosed and doing the whole- go to any doctor that might have a clue thing, I went to an allergist because some of the symptoms I had included my skin getting very hot and red. I thought maybe all the dizziness, feeling nauseous and hot could be chalked up to an allergy I wasn't aware of. The Dr. tested me for allergies and found a few- but said they weren't very severe. About a month after that appointment I wound up in the ER with an allergic reaction. Hives, facial swelling. And my asthma (which I already had) kicked in by the time I was being examined. The ER doc told me I needed to start carrying an epi-pen and pointed me in the direction of the 24hour pharmacy closest to the hospital. After all that, I went for a follow-up with a cardiologist who said he suspected I had POTS and wanted to prescribe a BB. He was hesitant because I had asthma but ultimately decided to try me on a small dose because my high HR was restricting my activity so much. We went over my list of meds but I forgot about the epi-pen because it was new and I had never needed to use it. When I picked up the script the paperwork mentioned something about blocking epinephrine in your system. When I saw epinephrine was mentioned I called the doc's office before starting the script just to be sure it was ok to take despite carrying an epi-pen. He called me back and told me not to take the BB. He said it could make the epi-pen not work as well. Everyone responds differently, but he wasn't comfortable with me going on the BB anymore. And that I would have to wait to see the POTS specialists he was sending me to for a med recommendation. I was disappointed because the he seemed so sure that a BB would help me feel better! I do want to point out that I'm not sure if that's true of all BB's. Since there are a bunch out there it definitely could have been the specific one he was going to put me on- I'm not sure. Incidentally when I saw the POTS specialists they put me on Midodrine- which when I looked it up, is listed in the same category as BB's under "monitor or modify rx" for possible epi-pen interactions. I guess they both constrict blood vessels so the Midodrine, Epi-pen together could cause a hypertension episode. Go figure- it seems like it's never easy when it comes to POTS! Heres the link to the Epi interaction info if anyone is interested- https://online.epocrates.com/u/1041760/Epipen/Drug+Interactions But if I ever need the epi-pen I'm either on my way to the ER or calling 911 anyway (since that's what I was told to do if I used it). So... I guess the hospital could deal with a BP issue if one occurred- I hope! I do wonder/worry from time to time, when I've felt like I'm having an allergic reaction and needed to pop a benadryl, what exactly taking the epi-pen would do to me and the POTS symptoms. Hope to never find out!