not PM a neuro that i went to see for the cluster headaches my issues is that i cant take regular migrain meds ie triptans becuase i stop breathing. but my normal with meds is 120-140 and i cant tell or it doesnt effect me because its been like this for the last 11 yrs and i have grown a custom to it. so over 160+ is when i get light headed and cant breath right and its low motion. because of my rsd and the way it has effected me i dont ever pass out period .!!!!! i have been awake at 210 HR and 20/0 BP no lie. i just dont pass out period with the way my sympathetic system has been effect and autonomic .. its crazy and i wish that i would be out like a rock when this happens but im not that lucky. i should be called murphy because what can and will happen will always happen to me period.