Adenosine
not listed / othe
"I have had to use this medication several times due to rapid heartrate. The highest my heart has increased is 260 bpm. Anytime I have had to call 911 they insert and IV and this medication is pushed very quickly through the IV. I do feel a good bit of pressure in my head. But it doesn't hurt in any way. They ususally have to do it twice for my heart rate to convert. It always works. It's not a problem once you understand that you are literally using a CTRL, ALT, DELETE technique. I have never had a side effect to this. My only effect to my experiences are....exhaustion for just having ran a marathon without actually have to run 26 miles.  :)"