Let me explain I normally vape juices at 65pg 35 vg or 70pg 20 vg I ordered some juices that were only available at a 50 50 ratio taste is fine very vapable but about 10 to 15 min after Ive vaped them i get a nasty sick feeling in my stomach and am somewhat dizzy. For the past two days Ive vaped my older bottles of 65 35 will no ill effects and I guess I like to torture myself tried a few hours ago with a tankfull of a new steeped juice at the 50 50 ratio and felt ill afterwards not while vaping it like a nicotine head rush but around the 10 to 15 min mark after I stopped vaping it.