Hi everyone. I'm new to the forum. I have dysautonomia (OI, GP, likely IST, can't thermoregulate) secondary to EDS and Complex Regional Pain Syndrome. I've been on midodrine for a long time for the OI... I'm largely reliant on a wheelchair anyway because of the CRPS and associate , but without the midodrine I'm almost bed-bound because I faint as soon as I'm upright. I actually fainted and fell while transferring from bed to chair a couple of years ago and fractured my spine in multiple places. Question is - some four hours or so after taking the midodrine, I 'crash'. I get very tired, very cold and shaky, my heart races more than normal. Does anyone else experience this? Laura