Midodrine
"I have been diagnosed with Dysautonomia & Postural Orthostatic Tachacardia Syndrome and many other things but this medicine was my only option I can't take beta blockers because I need to be able to use my epi-pen and I had a bad reaction to florinef so we decided to try midodrine.
 It is a lifesavor!  I can't go anywhere or do much of anything if I don't take it.  I will pass out if I'm not on this medicine, I'm very pleased!  I do have to deal with flushing and frequent headaches but it's very much worth it the cost."