Thanks, yeah I'm not vaping all day, I'll just take a puff here and there. Was just wondering if draw-by-draw it's the same as smoking a cigarette so I could use that as a reference. I'm not at all worried about vaping enough to kill me since the lethal dose is at least 40mg, but I don't know how healthy my heart is (awaiting an appointment with a cardiologist to check for possible Marfan syndrome) so I just don't want to vape enough that it'll cause tachycardia, just to be on the safe side.