postural orthostatic tachycardia syndrome
"I get seizures with allergic reactions from Mast cell activation syndrome (MCAS), but I didn't when I first took this drug in 2016. Lots of goosebumps, tingling, tight scalp, chills, shivering, and felt like a zombie, though. Became a different person- dissociated, honestly. That'd never happened to me before, was so afraid. Doctor made me try again, seized the entire time and the tingling burned so bad it felt like I was on fire. Got bradycardic within 2 hours of taking it, too. I get brady sometimes as it is (my heart rate was at 30 the other day) so this medication wasn't a good idea in the first place. Bad call on my doctor's part and bad call on mine for even listening to him."