Caffeine causes vasoconstriction.
MedlinePlus Medical Encyclopedia: Vasoconstriction
Well then post the study you are referring to.
"In the medical field" doesn't mean much to me.
I have NO respect for malpractice lawyers so I will just try to forget you said that.
I know it sounds like I'm pro marijuana but I'm not I just want you to post reputable, recent, and verifiable facts. It's like saying there was a correlation... it's like O.K. what was the coefficient? Lets get details here.