Adenosine
supraventricular tachycardia
"I have had this given through IV 2x and each time it cause my heart rate to go up to 200 and up,  it never lowered it.  Yes I had the crazy heavy feeling (like an elephant is on my chest) couldn't breath and was hot and dizzy not good! I will not allow doctors to inject this while having an episode I get another medication that works for me.  Unfortunately adenosine doesn't!"