Young man gamer inhaling of a vapor with electronic cigarette.Vape flavor liquid chemicals.Use of e cigarettes in the home.Smoking and vaping negative Stock Photo Alamy Sometimes when people vape for the first time they can feel quite unwell and, in some cases, they can actually be sick. This is due to the nicotine they're ingesting and is Mouth to Lung (MTL) Vs Direct Lung (DL) Inhale Explained E Cigarette Direct How to Inhale a Vape Properly: MTL, DTL & RDL